New Users Zoning/Land Use Permits Enforcement Applications/Handouts Fees Codes Information Center ITAP. Proposed use: single family dwelling

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1 Search PortlandOregon.gov Search City Home Government Bureaus & Offices of the City of Portland Sign In Development Services From Concept to Construction PHONE: TTY : SW 4th Ave, Portland, OR New Users Zoning/Land Use Permits Enforcement Applications/Handouts Fees Codes Information Center ITAP Applications/Handouts Permits & Inspections Appeals New Appeal Appeal Search APPEAL SUMMARY Status: Decision Rendered - Originally Held Over for Additional Staff Review Appeal ID: Hearing Date: 2/12/14 Project Address: 539 SE 59th Ct Appellant Name: Tad Everhart Case No.: M-001 Appellant Phone: Appeal Type: Mechanical Project Type: residential Building/Business Name: Appeal Involves: Alteration of an existing structure Plan Submitted Option: mail [File 1] [File 2] [File 3] [File 4] [File 5] [File 6] Plans Examiner/Inspector: Tad Everhart Stories: 2 Occupancy: Not given Construction Type: Not given Fire Sprinklers: No LUR or Permit Application No.: Proposed use: single family dwelling APPEAL INFORMATION SHEET Appeal item 1 Code Section All citations are to 2011 Oregon Residential Specialty Code (2011 ORSC), 2011 Oregon Plumbing Specialty Code (2011 OPSC), or 2010 Oregon Mechanical Specialty Code (2010 OMSC). Requires Code sections potentially relevant: 2011 ORSC 202 definitions of Appliance, Approved Agency, Heat Pump, and Listed ORSC M1201.1, M1301.1, M1302.1, M , M2005.1, M2005.3, and M OPSC and OMSC and ORSC and 2011 OPSC and It appears an electric storage water heater must be listed by Underwriters Laboratories which is an approved agency unless the code official finds the alternative appliance/equipment is satisfactory and complies with the intent of the code and is, for the purpose intended, at least the equivalent of that prescribed in the code in quality, strength, effectiveness, fire resistance, durability, and safety. Proposed Design Please see the attached description of the domestic hot water heat pump water heating system (HPDHW or heat pump) using carbon dioxide refrigerant and manufactured by Sanden USA (Sanden) that I wish to install to provide domestic hot water. The appliance/equipment consists of 1. the compressor/gas cooler outdoor unit (Sanden GAU-A45HPA ) and 2. the stainless steel water tank (Sanden GAU-315EQTA) which can be located indoors or outdoors (and we hope to install within our conditioned living area). Reason for alternative The Sanden HPDHW system (appliance) I wish to install is safer for people and property than alternative DHW systems because it heats water

2 1. without combustion of fossil fuels, 2. with a greater operating efficiency than both electric resistance water heaters and other HPDHW systems available in the market, and 3. using a natural refrigerant (CO2) which not only does not damage ozone but also has far lower global warming potential than refrigerants conventionally used in HPDHW systems. Climate change threatens human safety. Emissions from the combustion of fossil fuels causes climate change. Global warming caused by conventional refrigerants which have leaked into the atmosphere exacerbates climate change. Sanden s HPDHW system is safer than alternative DHW systems because it eliminates these causes of climate change. Its greater efficiency makes better use of electrical power and matches lower-output electrical systems like residential solar PV which have lower global warming potential. Alternative Technology Advisory Committee Recommendation I understand that on Thursday, January 16, 2014, the City of Portland Alternative Technology Advisory Committee (ATAC) decided to recommend approval of this technology, but I have not yet received a written decision from the ATAC. This MEC Appeal application relies on my ATAC application and materials supporting it with the following qualifications and supplementary materials: 1. My ATAC application included references to potentially using the Sanden HPDHW system for hydronic heating, but this MEC Appeal does not include hydronic heating. I understand that if I wish to use the Sanden HPDHW system for hydronic heating, I must file a new, separate MEC Appeal and obtain approval of that use of the Sanden and any other equipment for the hydronic heating system prior to installing it. I understand that the City of Portland s granting this MEC Appeal will not constitute approval of the Sanden HPDHW system for hydronic heating. 2. This MEC Appeal application relies on the following report delivered by separate Laboratory Assessment of Sanden GAU[-A45HPA] Heat Pump Water Heater Lab: A Report of BPA Technology Innovation Project #292, 18 Sept 2013 for Ken Eklund, WSU Energy Program by Ben Larson, Ecotope, Inc. (35 pages) (hereafter, WSU Report ). 3. Another argument in favor of the Sanden system is that it makes buildings powered by solar PV systems much more feasible, especially if the owners attempt to be net zero or are located off the grid. As the charts in the WSU Report show, the Sanden HPDHW system typically draws only 1kw. It will draw up to 2.4 kw in weather under 20F, but it is rarely that cold in Portland. Thus, the draw for probably 95% of our weather conditions is below 1.5kw, and it rarely exceeds 1kw in shoulder and summer months. This is a good match for residential rooftop-size solar PV system output. 1. The outdoor compressor unit consists of an electronic control logic board, water pump, fan and heat exchanger coils to transfer heat from air to the CO2 refrigerant, inverter compressor, and gas cooler (which is a double-copper jacketed heat exchanger which transfers the heat of the CO2 to the water). The system operates at a much higher pressure than most heat pumps used in residences, and that is why Sanden warns consumers to never tamper with or open the outdoor compressor unit. In fact, Sanden does not allow field technicians to work on the refrigerant system in the field. If the outdoor compressor unit fails, it is replaced with a new unit and the malfunctioning unit is sent back to Sanden s factory for analysis. However, these units are safe enough to be in growing use around us every day. Sanden makes CO2 refrigerant AC systems for many major automakers, vending machines, and grocery refrigerator cases. In fact, Coke is quickly transitioning its vending machines to CO2 refrigerant. See the letter of Coca-Cola to the US EPA delivered by separate and 2. CO2 refrigerant does not damage ozone and has far lower global warming potential (GWP) than conventional refrigerants used in HPDHW systems and residential heat pumps. CO2 has a GWP of 1. Conventional refrigerants include R-410a (GWP=2,000) and R-134a (GWP=1,320). Although people may hope, plan, and take steps to ensure that refrigerants do not escape into the atmosphere, they do. As air conditioning becomes more common throughout the world (including India and China), refrigerants in and by themselves pose a driver of climate change (please see attached New York Times article). This is one reason why the European Union is mandating phase-out of refrigerants with GWP exceeding 150. Sanden does much better than this, and it has already engineered a unitary system based on the same technology in France which has been awarded European Conformance. 3. CO2 HPDHW systems have substantially higher coefficient of performance (COP) and energy factor (EF) than conventional HPDHW systems available to consumers for DHW. This makes better use of energy. One of the most important points of the attached WSU report is the note on page 11 that for comparison with heat pump domestic hot water (HPDHW) systems available today on the market, the testing protocol of both NEEA s Northern Climate specification and USDOE assumes 135F water, but the Sanden is programmed to provide (and provided in WSU s testing) 149F water. Therefore, the comparison of Energy Factors for HPDHW systems evaluated by USDOE (typically in the range of EF of ) understates Sanden s performance. Sanden s EF may be almost twice that of the most-efficient HPDHW system on the market. APPEAL DECISION

3 Unlisted electric storage water heater: Granted subject to ATAC's recommendation of approval. The Administrative Appeal Board finds that the information submitted by the appellant demonstrates that the approved modifications or alternate methods are consistent with the intent of the code; do not lessen health, safety, accessibility, life, fire safety or structural requirements; and that special conditions unique to this project make strict application of those code sections impractical. Back to Top City of Portland Community Business Visitors Government Investor Information Site Menu Development Services Home New Users Zoning/Land Use Permits Enforcement Applications/Handouts Fees Codes Information Center ITAP Access Subscribe View Text-Only Request ADA Accommodation Privacy Policy Captioning / Transcription Policy Copyright 2014 City of Portland, Oregon

4 City of Portland, Oregon Bureau of Development Services 1900 SW 4 th Avenue, Suite 5000 Portland, Oregon (503) Alternative Technology Advisory Committee Application Form For information about the Alternative Technology Advisory Committee, instructions for filling out this application form and a list of submittal requirements please see our web site at Applicant Information: Name: Tad Everhart Company Name: None Address: tad.everhart@comcast.net; teverhart@earthadvantage.org Address: 539 SE 59 th Court City: Portland State: OR Zip Code: Phone No.: (503 ) FAX No.: (none ) Project Information: This application involves (check one): A technology not associated with a specific project A specific project currently under review Project Address: Tax Account number: Building Permit No.: LU Case No (if applicable): X Other (specify): A specific project not yet under review but for which all required building and/or plumbing/mechanical/electrical permits will be requested if technology is recommended by ATAC. I. Overview of Technology A. Proposed Technology: Please describe the material/product/construction method you would like to have reviewed by the committee Domestic hot water heat pump water heating system (HPDHW or heat pump) using carbon dioxide refrigerant and manufactured by Sanden USA (Sanden). The Sanden heat pump I wish to install heats water which flows from the (outdoor) unit to a storage tank. All refrigerant is contained within the outdoor condenser unit. Heat from the refrigerant is transferred to water in the outdoor unit. That unit is connected to the tank with control wiring and both cold and hot water lines. The water lines are connected to a hot water storage tank. The unit is also connected to 220volt power supply. The Sanden heat pump is not yet UL-listed. B. Application of Technology: Please describe the specific application of the technology. How, when and where will this technology be used? I hope to install (immediately upon ATAC s recommendation and successful code appeal) the Sanden HPDHW outside my house to supply our DHW. Eventually, I hope this system can help supply heated water for a hydronic coil to heat air in our ventilation system to provide space heating.

5 C. Code Conflicts: Please describe any known building code issues related to this technology. This is a mechanical system which is not yet UL-listed. II. Sustainability A. Sustainable Elements: Describe how this alternative substantially reduces the environmental impact on the planet over similar technologies currently allowed by the code? Please attach any documentation that supports your answer. 1. CO2 refrigerant has far lower global warming potential (GWP=1) than conventional refrigerants used in heat pumps. It does not damage ozone. 2. CO2 HPDHW systems have substantially higher coefficient of performance (COP) and energy factor (EF) than conventional HPDHW systems available to consumers for DHW. This makes better use of energy. 3. HPDWH systems are powered by electricity allowing renewable energy sources instead of fossil fuels. We currently have a high-efficiency gas DHW (tank) system, but we wish to avoid fossil fuels in order to minimize climate change. Unfortunately, HPDHW systems available in the US market for residential use have relatively low COP operating in the Portland area climate. Given the 40% coal primary energy for electricity in Portland combined with the low COP, our high-efficiency (condensing) gas DHW tank system appears to may cause less global warming than available HPDHW systems. However, with the higher COP of the Sanden system and our choice to purchase 100% wind electricity, we hope to reduce our impact on the environment and reduce our contribution to climate change. All without the risk of inadvertently causing global warming if/when refrigerants from millions of our HPDHW systems eventually escape into the atmosphere. 4. In addition, since we have a house that is close to meeting the Passive House Standard, we try to maintain it airtight integrity. We cannot have a gas DHW system inside the house without relatively large penetrations for ducts to carry in combustion air supply and to exhaust combustion products. Yet we would like to locate the DHW tank inside our home in order to enjoy the vagrant heat that escapes even the well-insulated Sanden DHW tank. This electric heating system allows only the relatively minor penetrations of our air barrier needed for water lines and wiring, and those penetrations are already in place and well-sealed. Thus, we can locate the storage tank indoors without large penetration in our air barrier. 5. The HPDHW system potentially simplifies mechanical systems for low-load houses like ours (and hopefully many others in Portland) by conceivably allowing us to combine water heating and space heating as a single system. A single system reduces resource use in manufacturing (including embodied energy in manufacturing and transportation energy) and minimizes maintenance, repair, replacement, and total lifetime costs. At this time, we will not attempt to use the Sanden DHW for space heating, but it is a possibility for the future. 6. The HPDHW has a hot water storage tank which allows us to make use of off-peak electrical power generation by heating water and storing the heat in the DHW tank at that time for later use during the hours of peak electrical load (when our compressor and heat exchanger will not need to be running). This thermal battery becomes a means to store electricity that may be produced by renewable energy systems in excess of the grid load (e.g., late at night and early in the morning). Clearly, achieving this optimal timing will take some careful thought and planning. Ideally, we can also optimize the time of day in which the system operates (in compression heat collection cycle) while storing heat in the tank for space heating needs during periods when the compressor is not operating. This allows us to take advantage of diurnal high ambient temperatures where the system COP is higher. Unfortunately, peak daily temperatures often coincide with peak loads on the grid. However, the CO2 refrigerant technology promises relatively high COP even at colder ambient supply air temperatures. B. Reason for Alternative: Describe why this alternative is desired? As stated above, this alternative makes better use of resources, uses less energy, and avoids environmental damage associated with conventional refrigerants (having high GWP).

6 C. Comparison to Other Technologies: How does this technology provide equivalent life safety and/or fire protection than the current technologies allowed by the code? The significant differences of this heat pump and conventional alternatives is that CO2 is used as higher temperatures and pressures which are as safe given equipment designed and manufactured for those temperatures and pressures. The Sanden outdoor unit is sealed at the factory and is not to be repaired on site. In the event it does not function correctly, it is disconnected and returned to the manufacturer for analysis and disposition. This is not a system in which the refrigerant is installed (and pressurized) onsite. III. Supporting Documentation A. Testing Data: Describe any testing that has been performed on this technology to show how it may be able to meet code requirements. Please attach all available testing data. The government of Japan supported development and testing of CO2 refrigerant HPDHW systems from Eco-cute units substantially similar to the Sanden unit we wish to install have been sold in Japan to consumers since Sanden has been testing its HPDHW system since The company has mass-produced CO2 heat pump water heaters in Akagi, Japan in since 2006 and in Tinteniac, France since Sanden has established markets in Japan, France and Australia. The unit tested by NEEA is an indoor unit that is manufactured and currently sold in France (which we do not hope to install). The unit tested by Washington State University is a split unit that is manufactured in Japan and currently sold in Australia. We hope to install this system. In addition to Sanden s initial testing and continuous testing, over the last year Ken Eklund of the Washington State University Extension Energy Program has been bench testing the exact unit we wish to install. He reports no failures or unsafe operating conditions in his testing. In fact, his initial testing has yielded such favorable results that Bonneville Power Administration is funding WSU s pilot project involving installation of this same Sanden unit in 4 homes through the Pacific Northwest. Mr. Eklund s presentation is cited below. One printed copy of all supporting documentation is attached with links to documents on internet below: WSU presentation on early test results of Advanced Heat Pump Water Heater Research project for REHVA Journal October 2012 Inside view into the Japanese heat pump Wilkenfeld presentation to ACEEE 5 November 2013 Heat Pump Water Heaters: Growing the Global Owner s Manual for Sanden Heat Pump Water Heater with Natural Refrigerant (CO2) for model GAUS- 315EQTA (Heat Pump Unit GAU-A45HPA and Tank Unit Brochure (including international certifications on last For certification information, see For IAPMO For Japan Accreditation For Union of Japanese Scientists and Engineers (JUSE Registered

7 Information for comparing Sanden s product with other heat pump water heaters available in our market BPA Residential Heat Pump Water Heater Evaluation: Lab Testing & Energy Use Estimates 9 November 2011 (only first 2 of 90 pages is attached, but entire report on HPDHW systems available in df ENERGY STAR database printed for HPDHW systems available in US with energy factor (EF) highlighted (4 pages printed only) General Information about Sanden and its product development in Europe (different Sanden HPDWH model) : Dr.-Ing. Georges Khoury Development of high efficiency CO2 Heat Pump for domestic hot Also see information about Sanden at Everything B. History of Use: Describe all known instances where this technology has been applied to a constructed building, including approximate date, location and building type. Please attach any documentation that supports your answer. Please see articles and documents cited above showing installations in Japan (over 3.5 million), Australia, and Europe. The REHVA Journal states fast-growing sales in Japan had reached 550,000 units in Responsibility Statement: As the applicant submitting this application I am responsible for the accuracy of the information submitted. I have submitted all the relevant information available about the technology I am requesting the Alternative Technology Advisory Committee to review. I believe the information submitted to be a compete and accurate representation of the proposed technology and I am aware that any omission (either voluntary of accidental) could cause the application to be denied. I understand that more information may be requested before the committee can make a recommendation on my application. I understand that the recommendation from the committee is not binding. In addition a favorable recommendation from the committee is not a guarantee that the Administrative Appeals Board will approve a subsequent building code appeal. The City of Portland and the committee members have no implied or expressed liability associated with the conclusions of the Alternative Technology Advisory Committee. By my signature, I indicate my understanding and agreement to the Responsibility Statement. Applicant s signature: Property owner s signature (if applicable): Tad Everhart Date: 11/20/13 Date: 11/20/13 For Office Use Only: Received By: Date Received: Receipt No.:

8 Via to February 2, 2014 APPEALS Bureau of Development Services City of Portland c/odonna Ruark, Office Support Specialist III BDS Appeals Secretary Re: 1/31/14 MEC Appeal for Sanden CO2 refrigerant heat pump water heater Dear Appeals, This letter is to supplement and amplify the information contained in my 1/31/14 appeal. Supplement. 1. The MEC Appeal contains the first 10 pages of a NEEA report from the laboratory testing of the equipment I wish to install. One of the authors told me that the report would be posted on NEEA s Conduit website, but it is still not available there. Therefore, I have attached the entire report. 2. Another argument in favor of the Sanden system is that it makes buildings powered by solar PV systems much more feasible, especially if the owners attempt to be net zero or are located off the grid. As the charts in the NEEA report show, the Sanden HPDHW system typically draws only 1kw. It will draw up to 2.4 kw in weather under 20F, but it is rarely that cold in Portland. Thus, the draw for probably 95% of our weather conditions is below 1.5kw, and it rarely exceeds 1kw in shoulder and summer months. This is a good match for residential rooftop size solar PV system output. 3. The outdoor compressor unit consists of an electronic control logic board, water pump, fan and heat exchanger coils to transfer heat from air to the CO2 refrigerant, inverter compressor, and gas cooler (which is a double copper jacketed heat exchanger which transfers the heat of the CO2 to the water). The system operates at a much higher pressure than most heat pumps used in residences, and that is why Sanden warns consumers to never tamper with or open the outdoor compressor unit. In fact, Sanden does not allow field technicians to work on the refrigerant system in the field. If the outdoor compressor unit fails, it is replaced with a new unit and the malfunctioning unit is sent back to Sanden s factory for analysis. However, these units are safe enough to be in growing use around us every day. Sanden makes CO2 refrigerant AC systems for many major automakers, vending machines, and grocery refrigerator cases. In fact, Coke is quickly transitioning its vending machines to CO2 refrigerant. See the attached letter of Coca Cola to the US EPA and cola unbottled/cooler choice freezing out hfc in favor of natural

9 refrigerant I have attached a 2007 article from the New York Times noting that many automakers are switching to CO2 refrigerant AC. Amplify. 1. CO2 refrigerant has far lower global warming potential (GWP=1) than conventional refrigerants used in heat pumps. It does not damage ozone. Conventional refrigerants include R 410a (GWP=2,000) and R 134a (GWP=1,320). Although people may hope, plan, and take steps to ensure that refrigerants do not escape into the atmosphere, they do. As air conditioning becomes more common throughout the world (including India and China), refrigerants in and by themselves pose a driver of climate change (please see attached New York Times article). This is one reason why the European Union is mandating phase out of refrigerants with GWP exceeding 150. Sanden does much better than this, and it has already engineered a unitary system based on the same technology in France which has been awarded European Conformance. 2. CO2 HPDHW systems have substantially higher coefficient of performance (COP) and energy factor (EF) than conventional HPDHW systems available to consumers for DHW. This makes better use of energy. One of the most important points of the attached NEEA report is the note on page 11 that for comparison with heat pump domestic hot water (HPDHW) systems available today on the market, the testing protocol (for both NEEA s Northern Climate specification and USDOE) assumes 135F water, but the Sanden is programmed to provide 149F. Therefore, the comparison of Energy Factors for HPDHW systems evaluated by USDOE (typically in the range of EF of understates Sanden s performance. Sanden s EF may be almost twice that of the most efficient HPDHW system on the market. For More Information In order to avoid environmental damage from printing, I included electronic links for additional information about Sanden s system and CO2 refrigerants in my application to ATAC. I have attached an electronic copy for this Appeal. Thank you. Sincerely, Tad Everhart Enclosures: NEEA laboratory test report Coca Cola draft comments to US EPA

10 Electronic copy of Application to City of Portland Alternative Technology Advisory Committee (ATAC) December 2, 2007 New York Times Greenhouse Villain Could Be a White Knight After All by Kevin Cameron June 20, 2010 New York Times Relief in Every Window, but Global Worry Too by Elisabeth Rosenthal and Andrew W. Lehren

11 9 June 2009 To: Alternative Technology Advisory Committee Bureau of Development Services c/o Debbie Cleek 1900 SW 4th Avenue, Suite 5000 (5th floor) Portland, OR From: Barry Stephens Zehnder America, Inc Re: ATAC application: Tad Everhart Zehnder/JE StorkAir ComfoAir 350 Heat Recovery Ventilator Date: 9 June 2009 Tad Everhart has indicated interest in utilizing the CA 350 Heat Recovery Ventilator manufactured by JE StorkAir, a Dutch subsidiary company of Zehnder Group, AG of Switzerland. As the National Sales and Marketing Manager for Zehnder America, Inc, I am submitting the following information to the Portland ATAC or their consideration for recommendation for inclusion in Mr. Everhart s Passive House Institute residential construction project. I have included the following documents for review: 1) ISO 9000 and ISO Certificates for JE StorkAir (English) 2) ComfoAir 350 Operating Manual (English) 3) TUV Test Certificate (German) 4) Passive House Institute Certificate (German) 5) SAP Test Certificate (English) 6) WHR 950 Literature (English) At this writing, we are in the process of producing English versions of those items indicated as being in German. The ComfoAir 350 (CA 350) and WHR 950 are the same product, sold under different brands in different markets. JE StorkAir has been in operation in The Netherlands since 1937, and is the premier ventilation manufacturer n Europe. Zehnder Group, formerly Zehnder AG, has been in operation since 1895 in Switzerland. We now have manufacturing facilities throughout Europe, in China and in Ward Hill, MA (Runtal North America) and Buffalo, NY (Hydro Air). Zehnder America, Inc has been operating from offices in NH since September Our companies which have been operating in the USA have established themselves as premier brands in our respective product categories, and we provide extended warranties on all of our products. With established networks for sales, marketing, distribution and service throughout North America, we are confident in our plans to provide the same committed support for service and support for new products, including our HRV/ERV products manufactured by JE StorkAir and other subsidiary ventilation companies. The ComfoAir 350 and other JE StorkAir products have a significant history of reliability and quality, and the service and maintenance required for these products is minimal. This is one reason for introducing these products as our initial introduction of energy efficient residential HVAC products in North America. Additionally,

12 all Zehnder Group products are covered with comprehensive product liability insurance, and contractors, vendors or homeowners can request proof of insurance and be provided certificates of same. Zehnder America, Inc is planning for production of UL/ETL/CSA listed versions of the ComfoAir 350 and other key products. This process requires a protracted time frame, and to date we do not have an estimated time to completion for this process. The ComfoAir 350 is compatible with existing HVAC components sold in North America, and will not require any retrofit to operate and function to its full potential. We have fitted the North American units with a standard 220 V plug which can be plugged in to standard code approved 220 V service outlets. The controls are integral to the unit, and standard English measured ducting will be fully compatible with the duct ports on the unit. I have been operating a ComfoAir HRV (the previous model) in a ComfoBox geothermal system in my home in Maine for two years with not a single problem or issue. I have changed the filters as recommended, and the unit has operated 24/7/365 for the entire two years. I performed the installation personally, and had no issues, difficulties or challenges whatsoever. Please feel free to contact me at my office in NH if there any further questions or requirements for this application.

13 Zehnder America, Inc 540 Portsmouth Avenue Tel Greenland, NH Toll Free USA Fax

14 City of Portland, Oregon Bureau of Development Services 1900 SW 4 th Avenue, Suite 5000 Portland, Oregon (503) Alternative Technology Advisory Committee Application Form For information about the Alternative Technology Advisory Committee, instructions for filling out this application form and a list of submittal requirements please see our web site at Co-Applicant Information: Name: Charlie Stephens Company Name: Adjuvant Consulting Address: cstephens@spiritone.com Address: SE Fair Oaks Avenue. City: Oak Grove State: Oregon Zip Code: Phone No.: (503) FAX No.: ( ) Name: Tad Everhart Address: tad.everhart@comcast.net Address: 539 SE 59 th Court City: Portland State: Oregon Zip Code: Phone No.: (503) Project Information: This application involves (check one): XX A technology not associated with a specific project A specific project currently under review Project Address: Tax Account number: Building Permit No.: LU Case No (if applicable): Other (specify): I. Overview of Technology A. Proposed Technology: Please describe the material/product/construction method you would like to have reviewed by the committee Zehnder/JE StorkAir ComfoAir 350 Heat Recovery Ventilator ( StorkAir 350 HRV ) manufactured by J.E. Stork Ventilatoren (JE Stork). B. Application of Technology: Please describe the specific application of the technology. How, when and where will this technology be used? Tad Everhart wishes to install the StorkAir 350 HRV in his family s home in Portland, Oregon as soon as the City of Portland permits. If the City of Portland approves the StorkAir 350 HRV, we anticipate approximately 5 installations in 2009 and the number of installations doubling each successive year. C. Code Conflicts: Please describe any known building code issues related to this technology.

15 The StorkAir 350 HRV is not yet approved by Underwriters Laboratories or ETL SEMKO. II. Sustainability A. Sustainable Elements: Describe how this alternative substantially reduces the environmental impact on the planet over similar technologies currently allowed by the code? Please attach any documentation that supports your answer. In Portland s climate, energy-efficient homes are virtually air-tight. Otherwise, random or accidental ventilation through the building envelope (ceiling, walls, and floor) causes uncontrolled heat loss in the heating season and heat gain in the cooling season. For this reason, designers and building scientists recommend air-tight buildings with balanced, mechanical ventilation. Most energy-efficiency building standards recommended by local and state governments and the United States include an air-tightness standard. Local examples are the Northwest Energy Star standard of no more than 7 Air Changes per hour (ACH) at 50 Pascals (50 Pa) depressurization by a blower door. The Oregon High Performance Home standard is 5 50 Pa. The Passive House Institute U. S. standard is Pa. Buildings this air-tight require mechanical ventilation, and in Portland s climate, an HRV is the only energy efficient means for balanced mechanical ventilation. An HRV s operating performance is measured in two ways: 1) thermal efficiency (the degree to which it transfers heat) and 2) electric power consumption (to produce rated airflow). HRVs approved by UL and ETL SEMKO are readily available in the Portland area (Please see the attached chart prepared by Mr. Stephens comparing the StorkAir 350 HRV with UL-approved, relatively high-performance ERVs and HRVs). Some of them have relatively high thermal efficiency or relatively low power consumption. The StorkAir 350 HRV combines thermal efficiency with low electric power consumption better than any other ERV or HRV on the list. Buildings that meet the Passive House standard are so air-tight and well insulated that internal heat from occupants, typical residential electrical appliances, and residential activities (particularly cooking and bathing) meet virtually the entire heating load and annual heat demand. Portland residents can live and work in Passive House buildings that consume so little energy that today it is feasible to supply all of the buildings operating energy with renewable energy. However, this passive strategy depends on energy-efficient HRVs and ERVs. The Passive House Institute recommends the HRV have at least 75% thermal efficiency and consume no more than 0.45 Watt hours per cubic meter ( watt-hrs per cubic foot) of air flow. Typically, a building cannot meet the Passive House standard without a HRV this efficient. Thus, the Passive House Institute certifies only HRVs meeting this standard (including the StorkAir 350 HRV). B. Reason for Alternative: Describe why this alternative is desired? Radically reducing building operating energy consumption is widely accepted by the City of Portland and its citizens as desirable for a number of reasons including but not limited to: 1. Increasing national security 2. Reducing building operating costs 3. Reducing environmental harm caused by extracting and burning fossil fuels 4. Speeding implementation of on-site renewable energy systems 5. Passive Houses are more comfortable and quiet than conventional homes

16 Applicant Everhart wishes to install the StorkAir 350 HRV in his home as part of a Passive House Retrofit to meet either the Retrofit standard or the Passive House standard. Several other persons would like to install the StorkAir 350 HRV or other comparable high-performance HRVs in 2009 and It is highly unlikely that HVI testing and UL or ETL certification for the StorkAir 350 HRV will be completed by Recent experience with UL/ETL suggests that there could be long delays in getting the products like the StorkAir 350 HRV through these testing and certification processes, and that delay would deprive our market of the most efficient, highest quality HRVs available today. C. Comparison to Other Technologies: How does this technology provide equivalent life safety and/or fire protection than the current technologies allowed by the code? The StorkAir 350 HRV is a current technology allowed by the code but not yet tested or certified by HVI, UL, or ETL. The StorkAir 350 HRV incorporates superior design, heat transfer core, and electronicallycommuted motors. J.E. Stork s StorkAir 350 HRV s safety is proven by successful sales of approximately 250,000 units over 12 year, J.E. Stork s ISO ratings, J.E. Stork s assurances of conformity with relevant European Community Directives, and certification by a number of recognized and well-respected 3 rd party certification programs. J.E. Stork products are certified in accordance with Europe s CE standards. These are as stringent or more stringent than UL, ETL, or CSA standards. Further, the StorkAir product lines have no history of safety issues over the many years of their production. Because UL/ETL/CSA certification processes can take many months, and often years, we are proposing that the ATAC consider the CE certification equivalent to that of UL, ETL or CSA until such time as the product achieves these North American certifications. To the extent that the StorkAir 350 HRV makes energy-efficient buildings possible, it increases national security and decreases environmental harm---thereby providing greater life safety and fire protection than currently permitted HRVs. III. Supporting Documentation A. Testing Data: Describe any testing that has been performed on this technology to show how it may be able to meet code requirements. Please attach all available testing data. The StorkAir 350 HRV bears the European Conformance mark ( CE ) at on page one of the Introduction of the attached Operating Manual (at page 5 of 56 page attachment)). Additionally, please see page 49 of the Operating Manual for J.E. Stork s assurance of conformity with the 3 European Community Directives that apply to it: 1) the Machine Safety Directive, 2) the Low Voltage Directive, and 3) the Electromagnetic Compatibility Directive (at page 53 of 56). We have also attached the 5 relevant Directives that the J.E. Stork s assurance of conformity references. A brief explanations of the European Union s consumer safety assurance and testing program and mandatory conformity mark CE is at The Passivhaus Institute in Germany has tested and certified the StorkAir 350 HRV for its thermal efficiency (84%) and its electrical power consumption (0.29 Watt hours per cubic meter of air flow). Please see attached PHI Certificate and note that PassivHaus has used its own efficiency certification methodology, so it s ratings may not match those of the manufacturer or other common third-party ratings. The manufacturer, J.E. Stork, meets the Quality Management System Standard ISO 9001:2008 and the Environmental Management System Standard ISO 14001:2004. Please see attached Lloyd s Register Quality Assurance certificate for each Standard.

17 B. History of Use: Describe all known instances where this technology has been applied to a constructed building, including approximate date, location and building type. Please attach any documentation that supports your answer. J.E. Stork has produced and sold approximately 250,000 HRVs similar to its 350 HRV featuring counterflow heat exchangers and electronically-communited permanent magnet DC motors since It expects to sell 25,000 in It has produced HRVs since the late 1980s. Mr. Barry Stephens (Charlie Stephens brother) has operated the StorkAir 350 HRV in his own home in Maine for two years without any problems (please see attached June 9 th letter from Barry Stephens). Responsibility Statement: As the applicant submitting this application I am responsible for the accuracy of the information submitted. I have submitted all the relevant information available about the technology I am requesting the Alternative Technology Advisory Committee to review. I believe the information submitted to be a compete and accurate representation of the proposed technology and I am aware that any omission (either voluntary of accidental) could cause the application to be denied. I understand that more information may be requested before the committee can make a recommendation on my application. I understand that the recommendation from the committee is not binding. In addition a favorable recommendation from the committee is not a guarantee that the Administrative Appeals Board will approve a subsequent building code appeal. The City of Portland and the committee members have no implied or expressed liability associated with the conclusions of the Alternative Technology Advisory Committee. By my signature, I indicate my understanding and agreement to the Responsibility Statement. Applicant s signature: Date: 6/24/2009 Co-Applicant and Property owner s signature (if applicable): Tad Everhart Date: For Office Use Only: Received By: Date Received: Receipt No.: Stephens & Everhart HRV ATAC Application Form final draft 62409

18 100 Rittling Blvd. Buffalo, NY USA Attn: Tad Everhart July 16, 2009 Dear Tad, I m writing this letter to clarify any questions regarding the HRV that the city of Portland may have. 1. What modifications to the HRV will be required for installation in the US? Simply, the unit comes in from the manufacture with pre existing terminal blocks for incoming power. A 600v 15amp rated linecord with a 220v plug will be purchased and installed. The installation will consist of feeding the linecord through a cord grip and attaching the wires to the proper terminal blocks. 2. Is the equipment rated for both 50 and 60 hertz? The equipment is rated for 50 and 60 Hz, although the nameplate for the equipment states 50 Hz only. All component specifications (controllers, blowers, etc) indicate 50/60 Hz. 3. Provide the FLA (Full Load Amps) There are 5 different settings: FLA Absent 6w.09amp.11amp Low 23w.24amp.30amp Medium 106w.87amp 1.09amp High 240w 1.77amp 2.21amp Max 241w 1.78amp 2.23amp 4. Provide MOCP ( Maximum Overcurrent Protection) 15AMPS

19 5. Provide the RLA (Rated Load Amps) There are 5 different settings: Absent 6w.09amp Low 23w.24amp Medium 106w.87amp High 240w 1.77amp Max 241w 1.78amp 6. Illustrate how the equipment will be grounded for a US installation, it is anticipated that the inspectors in the US will want "line to line" grounding. Europe uses line to neutral grounding. The 220v incoming power will be a 3-wire hookup which the two hot legs will land on the designated terminals as would the European 220v. Included will be the ground wire Attached to the designated chassis ground of the unit. Please do not hesitate to call with any questions that you may have. Thank you. Regards, Darin Heppner Sr. Electrical Engineer dheppner@rittling.com Phone : ext34

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22 ComfoAir 350 Operating Manual

23 Table of Contents 1 INTRODUCTION Foreword CE Symbol Warranty and Liability General Warranty Terms Liability Safety Safety Precautions Safety Installations and Safety Measures Symbols Used INSTRUCTIONS FOR THE USER Definition of Terms Balanced Ventilation Heat Recovery Bypass for Free Cooling Frost Protection Chimney Sweep Control Moisture Recovery (Option) Available Operating Aids CC Ease Operating Unit position Switch (Option) Bathroom Switch (Option) Use of the CC Ease Operating Unit Setting Date and Time Reading and Setting Comfort Temperature Reading and Setting Ventilation Level Switching Extractor Hood On and Off (Option)* Switching Supply and Exhaust Air Fan On and Off Setting Ventilation Programme Setting Additional Functions via the P Menus Use of the Switch(es) (Option) Setting Ventilation Using 3-position Switch(es) Setting Ventilation Using Bathroom Switch(es) Service by the User Cleaning or Replacing Filters Cleaning Valves (in the Home) Malfunctions Malfunction indication on the CC Ease Display position Switch with Malfunction LED What to Do in the Event of a Malfunction? End of Service Life Table of Contents III

24 3 FUNCTION OF THE SYSTEM Components of the Balanced Ventilation System Controlled Ventilation System ComfoAir Additional Options Ventilation via Extractor Hood* Preheater in ComfoAir Post-heater* in Duct System CO2 Sensor* in the Home RH Sensor* in the Home Underground Geothermal Heat Exchanger* Chimney Sweep Control Technical Specifications Dimension Sketch INSTRUCTIONS FOR THE INSTALLER Preconditions for Installation Installation of the ComfoAir Transport and Unpacking Checking the Scope of Supply Wall Mounting Connection of the Air Ducts Connection of the Condensation Drain Commissioning the ComfoAir Setting the Air Specifications Maintenance by the Installer Inspection of Heat Exchanger and Fans Filter Cleaning, if Preheater is Fitted Malfunctions Malfunction Indications on the CC Ease Display Malfunction Indications on the CC Ease Display Remedy Malfunctions (or Problems) without Indications Spare Parts Wiring Diagram: ComfoAir 350 LEFT-HAND Standard Version Wiring Diagram: ComfoAir 350 LEFT-HAND Luxury Version Wiring Diagram: ComfoAir 350 RIGHT-HAND Standard Version Wiring Diagram: ComfoAir 350 RIGHT-HAND Luxury Version EC Declaration of Conformity IV Table of Contents

25 I 1 Introduction This chapter contains general information on the ComfoAir Foreword Apart from this general chapter, this operating manual consists of: A section for the user, A section with technical specifications, and A section for the installer. Read this operating manual carefully before putting the unit into operation. - User Chapters 1 to 3. - Installer Chapter 4. This operating manual contains all the information required for safe and optimum installation, operation and maintenance of the ComfoAir 350. In addition, it should serve you as a reference manual during service work so that this can be carried out safely and responsibly. The unit is subject to ongoing improvement and further development. Your ComfoAir 350 may therefore differ slightly from the descriptions in this operating manual. NOTE: This manual has been produced with the greatest care and attention. However, no rights can be derived from this. Furthermore, the company reserves the right to change the contents of this operating manual at any time without prior notifi cation. 1.2 CE Symbol The unit is marketed under the name ComfoAir 350. The ComfoAir 350 is a balanced ventilation system with heat recovery for healthy, balanced and energy-saving ventilation of living premises. The year of construction of the ComfoAir 350 is shown on the identifi cation plate of the ComfoAir Warranty and Liability General Our General Terms and Conditions in their latest wording apply to the ComfoAir 350. The warranty period begins with commissioning, but not later than one month after delivery. This applies to material replacement and does not include labour. It applies only on proof of maintenance having been performed by a specialist company in accordance with our instructions Warranty Terms The manufacturer's warranty on the ComfoAir 350 is for a period of 24 months after installation, but up to a maximum of 30 months after the date of manufacture of the ComfoAir 350. Warranty claims can be made only for material fl aws and/or design errors discovered during the warranty period. In the event of a warranty claim, the ComfoAir 350 must not be dismantled without the prior written authorisation of the manufacturer. The manufacturer's warranty covers spare parts only if these have been installed by an installer approved by the manufacturer. The warranty will be voided if: The warranty period has expired; The unit is operated without filter; Parts not supplied by the manufacturer are installed; Unauthorised changes or modifi cations are made to the unit Liability The ComfoAir 350 has been developed and manufactured for use in "balanced ventilation systems". Use in any other way does not constitute an 'intended use' and can result in damage to the ComfoAir 350 or in personal injury for which the manufacturer accepts no liability. The manufacturer accepts no liability for damage or injury resulting from the following causes: Failure to observe the safety, operating and maintenance instructions contained in this operating manual. Installation of spare part not supplied by the manufacturer. The responsibility for the use of such spare parts lies solely with the installer. Normal wear. Introduction 1

26 I 1.4 Safety Safety Precautions Observe the safety precautions given in this operating manual at all times. Failure to observe the safety precautions, warnings, comments and instructions can result in personal injury or damage to the ComfoAir 350. Only an approved installer is authorised to install, connect, commission and service the ComfoAir 350 in a way other than that described in this operating manual. The ComfoAir 350 must be installed in accordance with the general local building, safety and installation regulations of the responsible public utility and other relevant safety authorities (such as the GIW - Dutch Institute for Certifi ed Builders). Follow the safety precautions, warnings, comments and instructions given in this operating manual at all times. Store this operating manual in the vicinity of the ComfoAir 350 at all times during its whole service life. The instructions on the regular cleaning and/ or changing of the fi lters and air inlet/outlet valves must be strictly observed The specifi cations contained in this document must not be altered. All modifi cations to the ComfoAir 350 are strictly forbidden. The ComfoAir 350 is not suitable for connection to an AC power supply. In order to ensure that the unit is inspected at regular intervals, we recommend that the user concludes a service contract. Your supplier can provide you with the addresses of authorised installers in your vicinity Safety Installations and Safety Measures The ComfoAir 350 cannot be opened without the use of tools. It must not be possible to touch the fans with your hand. An air duct must therefore be connected to the ComfoAir 350. The minimum duct length is 900 mm Symbols Used The following symbols are used in this operating manual: Caution! Danger of: - Damage to the unit, or - Physical injury to the user, or - Impairment of the operating of the unit if the instructions are not correctly followed. 2 Introduction

27 2. Instructions for the User This chapter describes how you should use the ComfoAir 350. Congratulations, you are now the owner of the ComfoAir 350, the heat recovery unit from Zehnder Comfosystems. We wish you every comfort Bypass for Free Cooling Apart from transferring heat from the exhaust air to the fresh, generally cooler outside air, the ComfoAir 350 also offers the possibility of discharging the warmer exhaust air directly into the atmosphere without passing through the heat exchanger. This is made possible by the integral bypass. The bypass is an additional circulating air duct that (temporarily) interrupts the heat transfer between the exhaust air and supply air. The cool outside air is then not preheated before it enters the dwelling. The bypass is used particularly on warm days during the summer months. Admitting the cool night air on warm days allows the room temperature in the home to be reduced. The bypass functions automatically. You simply have to set your comfort temperature. See section for further information. The ComfoAir 350 then maintains this temperature as closely as possible Definition of Terms The ComfoAir 350 has the following functions: Balanced ventilation. Heat recovery. Bypass for free cooling. Frost protection. Chimney sweep control. Moisture recovery (option). These terms/properties are described in more detail briefl y in the following sections Balanced Ventilation The ComfoAir 350 is a balanced ventilation system. This is the most economical and balanced form of ventilation for homes. In a balanced ventilation system, polluted air from kitchen, bathroom, toilet and possibly even store room is drawn off and replaced by an equal volume of fresh air in the living room and bedroom. Air gaps under the doors ensure good air circulation in the home. This air circulation is literally balanced. Ensure that these gaps are not covered by, for example, rubber door seal strips or high-pile carpets. This would prevent the system from operating optimally Heat Recovery Apart from ensuring the right balance between supply and exhaust air, the ComfoAir 350 also offers the advantage that the heat from the exhaust air is given off to the fresh, generally cooler outside air. This is made possible by the integral heat exchanger. In this way, roughly 95% of the discharged heat is recovered. The supply air can enter the rooms almost at room temperature. Draughts are now a thing of the past. Ensure that the comfort temperature in winter is not set below the temperature you prefer. If the comfort temperature in winter is below the preferred temperature, it is possible for the heating to be switched on with the bypass open. That is a waste of energy Frost Protection The ComfoAir 350 also has a frost protection system. This protects the heat exchanger (or the optional combined heat and moisture exchanger, see section 2.1.6) from freezing. The risk of freezing exists in the winter months with moderate to heavy frost. The ComfoAir 350 is equipped as standard with an automatically activated frost protection system that - when there is a risk of frost - temporarily reduces the supply of outside air so that condensation in the exchanger cannot freeze. A preheater can also be installed in the ComfoAir 350 as an option. This has the advantage that the balanced ventilation then remains operational. The inlet of cold outside air then no longer needs to be reduced. In addition, this option offers greater comfort as the supply air is again preheated to more or less room temperature. If there is no preheater installed in your ComfoAir 350, ask your installer about the possibilities Chimney Sweep Control The ComfoAir 350 also has a chimney sweep control system. This is a system that prevents the ComfoAir 350 from creating an imbalance in the ventilation system, i.e. between the supply and exhaust air. The chimney sweep control system functions automatically. This system blocks or resets other ventilation control systems that could possibly create an imbalance in the ventilation system and that can be automatically switched on and off by the software. One example of this is that the supply and exhaust air fans cannot be switched off separately when the chimney sweep control system is active. The chimney sweep control system is employed in dwellings with open fi re, as here air can be drawn back by the draught of the chimney. If problems occur with the smoke discharge via the draught of the chimney, this situation must on no account be caused (or exacerbated) by the ComfoAir 350. The chimney sweep control system then interacts with the existing ventilation control systems in such a way that the ComfoAir 350 cannot (or can no longer) cause an imbalance in the ventilation system. Instructions for the User 3

28 Moisture Recovery (Option) In addition to the heat transfer from the exhaust air to the fresh, generally cooler outside air, the ComfoAir 350 also offers the possibility of transferring part of the moisture of the exhaust air to the fresh, generally dryer outside air. This is made possible by the (optional) integral moisture exchanger. The moisture exchanger is supplied as a combined heat and moisture exchanger and is not installed as an additional exchanger alongside the heat exchanger of the ComfoAir 350. This exchanger then has an additional function, i.e. recovering moisture in addition to the recovery of heat. In this way, up to 65% of the moisture is recovered from the exhaust air. The supply air can thus enter the rooms with an increased moisture content CC Ease Operating Unit The ComfoAir 350 is operated using the CC Ease operating unit. The CC Ease (= Comfort Control Ease) operating unit is installed on the wall in the living room and communicates from there with the ComfoAir 350. The ComfoAir 350 is equipped as standard with only a heat exchanger. The exchanger with combined heat and moisture recovery can be ordered as an option. 2.2 Available Operating Aids The ComfoAir 350 is equipped with the following operating aids: CC Ease operating unit of the ComfoAir 350. Position switch (option) for setting the ventilation levels. Bathroom switch (option) for temporarily setting the highest ventilation level. The next section describes briefl y what information can be read off. These operating aids are described in more detail briefly in the following sections. 4 Instructions for the User

29 2 Day and time Automatic or manual ventilation Warning to replace internal (I) or external (E) Filter Air supply and/or air exhaust OPEN or CLOSED Geothermal heat recovery, post-heater and/or bypass on Actual ventilation position (with activated extractor hood, if applicable) Comfort temperature setting (also indicates whether system is heating or cooling) The CC Ease operating unit has various keys for operating and setting the ComfoAir 350. These keys are explained below. This key is used to switch the extractor hood on or off. - Press for less than 1 second ON. - Press for longer than 1 second OFF. This key is used to switch the supply and/or discharge of air on or off. - Press once SUPPLY OFF (and EXHAUST ON). - Press twice SUPPLY and EXHAUST OFF. - Press three times EXHAUST OFF (and SUPPLY ON). - Press four times SUPPLY and EXHAUST ON. This key allows you to read off or set the comfort temperature. - Press for less than 1 second READ OFF. - Press for longer than 1 second SET. This key allows you to switch from AUTO to MANUAL ventilation. - Press for less than 1 second Set ventilation programme. - Press for longer than 1 second Set date and time. These keys allow two functions to be set: - In AUTO ventilation Select the ventilation level. - In MANUAL ventilation Enter the setting values position Switch (Option) Ventilation with the ComfoAir 350 can also be operated by means of a 3-position switch. Type 1 Type 2 A 3-position switch can be used to set the ventilation levels of the ComfoAir 350. One or more 3-position switches can be installed in a home (for example, in the kitchen). The exact version may differ slightly from the images above. The following switch types are available: Type 1 Standard 3-position switch. Type 2 3-position switch with LED for malfunction and fi lter indication. Type 3 Wireless 3-position switch with: LED for malfunction and fi lter indication. Auxiliary switch: position 3 is activated for a given time (2 possibilities for setting the time). Type 3 Instructions for the User 5

30 Bathroom Switch (Option) Ventilation with the ComfoAir 350 can also be operated by means of a bathroom switch. A bathroom switch can be used to temporarily set the highest ventilation level of the ComfoAir 350. This switch can be installed in the bathroom, for example, for discharging excess moisture as quickly as possible after showering. As the bathroom switches can have very different designs, no switch is illustrated here. If desired, the user can also enter an activation and deactivation delay for the bathroom switch via the CC Ease operating unit (see section 2.3.7). This allows the user to specify, for example, that the ComfoAir 350 switches to the highest ventilation level 5 minutes after the bathroom switch is activated and then returns to the normal (or originally set) ventilation level automatically after 20 minutes. In many cases, however, no separate bathroom switch is installed and the bathroom ventilation control is integrated into the bathroom light switch. The ComfoAir 350 then switches automatically to the highest ventilation level when the bathroom light is switched on. The ComfoAir 350 then returns to the normal (or originally set) ventilation level as soon as the bathroom light is switched off. Here again, an activation and deactivation delay can be set via the CCE Ease operating unit. 2.3 Use of the CC Ease Operating Unit The following functions can be set using the CC Ease operating unit: Reading off and setting date and time. Reading off and setting the comfort temperature. Reading off and setting the ventilation levels. Switching the extractor hood on and off (option)*. Switching the supply and exhaust air fans on and off. Setting an individual ventilation programme. Setting additional ventilation control functions/options in the P menus. These functions are described in more detail briefly in the following sections Setting Date and Time Via the CC Ease operating unit it is possible: To set the date and time. Proceed as follows: 1. Press for two seconds on " ". 2. Wait until the day, e.g. "Sa", starts to fl ash. 3. Select with " " or " " the correct day. 7. Press " " briefl y again. 8. Wait until the minutes, e.g. " 00 ", start to fl ash. 9. Select with " " or " " the correct minutes. 10 Press " " briefl y again to quit the menu Reading and Setting Comfort Temperature Via the CC Ease operating unit it is possible: To read off and set the comfort temperature. The comfort temperature is the temperature at which the ComfoAir 350: (a) Uses the heat exchanger for heat recovery; (b) Switches on the bypass (hence bypassing the heat exchanger) to (temporarily) interrupt the exchange of heat between the exhaust air and the supply air. You can read off the comfort temperature, but also set the desired temperature. The ComfoAir 350 will then automatically maintain this temperature as closely as possible after setting. The comfort temperature generally corresponds to the temperature that you have set on the room thermostat (of your central heating). Reading off the comfort temperature Proceed as follows: 1. Press " ". 2. Wait until the comfort temperature is displayed. 3. Press " " briefl y now to quit the menu. 4. Press " " briefl y. 5. Wait until the hours, e.g. " 12 ", start to flash. 6. Select with " " or " " the correct hour. Without pressing the key, the menu is quit automatically after 30 seconds. 6 Instructions for the User

31 2 Setting the comfort temperature Proceed as follows: 1. Press for two seconds on " ". 2. Wait until the comfort temperature, e.g. " 20.0 ", starts to flash. 3. Select the desired comfort temperature with " " or " ". 4 Press " " briefl y now to quit the menu. Position 1 Low. - Use for a low ventilation require ment. Position 2 Normal. - Use for a normal ventilation requirement. Position 3 High. - Use this level during cooking, showering and when additional ventilation is desired.. As far as the ventilation is concerned, the ComfoAir 350 adjusts to the highest ventilation level set in the dwelling, unless otherwise set in the automatic software control. The ventilation level can be set as follows: 1. Press " " to increase the ventilation level. 2. Press " " to decrease the ventilation level Reading and Setting Ventilation Level Via the CC Ease operating unit it is possible: To read off and set the ventilation level. Reading off the ventilation level The currently set ventilation level, e.g. 2, is shown as standard on the CC Ease display. The ComfoAir 350 normally regulates the necessary ventilation level automatically. During automatic ventilation, "AUTO" is shown on the CC Ease display. During ventilation set by hand, the indication "MAN- UAL" appears on the CC Ease display. 3. Press " " to quit the menu. Setting the ventilation level You can also set the ventilation level by hand and thus increase or decrease the level. You have a choice of 4 ventilation levels. These are: Level A Absent. - Use during absence. In level A, the dwelling is ventilated with the prescribed minimum air volume. If level A is set on the CC Ease operating unit, the 3-position switches cannot be used. Instructions for the User 7

32 Switching Extractor Hood On and Off (Option)* Via the CC Ease operating unit it is possible: To switch the extractor hood on and off. Proceed as follows: 4. Press for two seconds on " ". 5. Wait until the symbol for the extractor hood appears. 6. Select with " " or " " the ventilation level, e.g. 3. This level can be used in the summer when the windows are open. The fresh air is then drawn into the house through the open windows and not via the supply air valves. 2. Press " " twice to switch off the exhaust air fan (and at the same time switch on the supply air fan again). 3. Press " " three times to switch on the supply and exhaust air fans again. 7. Press " " briefl y to switch off the extractor hood. After switching off the extractor hood, the symbol for the extractor hood disappears again from the CC Ease display. Note that by switching off the supply or exhaust air fan, you temporarily have no balanced ventilation with heat and (if installed) moisture recovery in your home Switching Supply and Exhaust Air Fans On and Off Via the CC Ease operating unit it is possible: To switch the supply air or exhaust air fan on and off. Never leave the fans switched off for longer than 12 hours. Proceed as follows: 1. Press " " once to to switch off the supply air fan. 8 Instructions for the User

33 Setting Ventilation Programme Via the CC Ease operating unit it is possible: To set an individual ventilation programme. A standard ventilation programme was set on the ComfoAir 350 during manufacture. This ventilation programme offers a suitable ventilation pattern for most homes. If you wish, you can adapt this standard ventilation programme to your own ventilation requirements. For example, for a week and a weekend programme. Weekday fan position Weekend fan position The ventilation programme can be set/changed as follows: 1. Press simultaneously for two seconds on " " and " ". This functions only with ventilation set to "AUTO". 2. Wait until the day appears. 3. Program the desired days or a sequence of days. Select the desired day/days with " " or " ". You have the following choices: Sequence of days: SaSu. Sequence of days: MoTuWeThFri. Sequence of days: SaSuMoTuWeThFri. Individual days: Sa, Su, Mo, Tu, We, Th and Fri. The number of the switching moment fl ashes in the bottom right-hand corner. Select the switching moment by pressing " " or " ". Press " " to confi rm the switching moment. 4. Program the starting time for the desired ventilation level. Press " ". Select with " " or " " the desired time in hours. Instructions for the User 9

34 2 2. Wait until "P menu" appears on the display. 3. Select the desired P menu with " " or " ", e.g. " 2 ". Press " " again. Wait until the minutes, e.g. " 00 " start to fl ash. Select with " " or " " the desired time in minutes. 4. Press " " to confi rm the P menu. 5. Select the desired P sub-menu with " " or " ", e.g. " 23 ". 6. Press " " to confi rm the P sub-menu. Press " " again. Wait until the ventilation symbol starts to fl ash. Select the desired ventilation level with " " or " ". Press " " to store the switching moment. 5. Program the next ventilation programme, if required. Then perform steps 1 to 5 for the next venti lation programme Setting Additional Functions via the P Menus Via several P menus of the CC Ease operating unit you can: Read off the status of various ventilation functions; Activate or deactivate time delays for various ventilation functions; Set time delays for various ventilation functions. In the P menus the user may: - only set the additional functions P1, P2 and P9. The remaining P menus P3 to P8 are reserved for the installer. Making settings in the P menus The minimum and maximum values for the available ventilation functions are stored in the software. 7. Select a new value for the function with " " or " ". 8. Press " " to save the value. 9. Repeat steps 5 to 8 to set several P sub-menus in turn in the same P menu. Or Return to the P menu; press once on " " and possibly start again at step 3. Or Return to the main window Press " " twice. Access to the P menus Proceed as follows: 1. Press " " and " " simultaneously. 10 Instructions for the User

35 2 Menu P1 Status of the functions Ventilation functions Sub-menu Description Activated / not activated P10 Menu 20 currently active? Yes (1) / No (0) P11 Menu 21 currently active? Yes (1) / No (0) P12 Menu 22 currently active? Yes (1) / No (0) P13 Menu 23 currently active? Yes (1) / No (0) P14 [Not available] [Not available] P15 Menu 25 currently active? Yes (1) / No (0) P16 Menu 26 currently active? Yes (1) / No (0) P17 Menu 27 currently active? Yes (1) / No (0) P18 Menu 28 currently active? Yes (1) / No (0) P19 Menu 29 currently active? Yes (1) / No (0) Menu P2 Set time delays Time delay values Sub-menu Description Minimum Maximum Default setting P20 (Option)* Deactivation delay for extractor hood function. 'x' minutes after pressing the extractor hood switch, the ComfoAir 350 returns to the previously set level. 0 Min. 180 Min. 30 Min. P21 (Option)* Note: Only for systems with wired switch and only if your system is equipped with a second position switch in the bathroom. P22 (Option)* Note: Only for systems with wired switch and only if your system is equipped with a second position switch in the bathroom. P23 Note: Only for systems with a wired position switch. Activation delay for the bathroom switch (to switch to the HIGHEST LEVEL). 'x' minutes after turning on the bathroom switch, the ComfoAir 350 switches to the HIGHEST LEVEL. Deactivation delay for the bathroom switch (to switch to the NOR- MAL LEVEL). 'x' minutes after turning on the bathroom switch, the ComfoAir 350 returns to the NORMAL LEVEL. Deactivation delay for ventilation position 3. When position 3 (HIGHEST LEVEL) is switched on briefl y (< 3 seconds), the ComfoAir 350 remains at this position for the time set in this menu. If, within the run-down time, the position switch or the radio remote control is activated, the ComfoAir 350 switches immediately to the set ventilation level. 0 Min. 15 Min. 0 Min. 0 Min. 120 Min. 30 Min. 0 Min. 120 Min. 30 Min. P24 Filter warning Here the user can select when "FILTER DIRTY" is to appear on the CC Ease display. 1 week 26 weeks 16 weeks Instructions for the User 11

36 2 P25 Note: Only for systems with a remote control switch. Deactivation delay for ventilation position 3 (with " "). When " " is pressed BRIEFLY (< 2 sec.), the ComfoAir 350 switches to the HIGHEST LEVEL for x minutes and then switches back automatically to the set level. x can be set between 1 and 20 minutes. 1 Min. 20 Min. 10 Min. Time delay values Sub-menu Description Minimum Maximum Default setting P26 Note: Only for systems with a remote control switch. P29 (Option)* Deactivation delay for ventilation position 3 (with " "). When " " is held depressed (> 2 sec.), the ComfoAir 350 switches to the HIGHEST LEVEL for 'x' minutes and then switches back automatically to the set level. x can be set between 1 and 120 minutes. Setting the Levels for the Extractor Hood. When the extractor hood is switched on, the ventilation levels for the extractor hood can be set a few percent higher than the corresponding 'normal' ventilation levels. Menu P9 Status of the functions (from menu P5) 1 Min. 120 Min. 30 Min. 1% 99% 10% Sub-menu Description P90 Chimney sweep control active? P91 Bypass open (=yes) / closed (=no)? P92 Valve of the geothermal heat (Option)* exchanger open (=yes) / closed (=no)? P93 (Option)* P94 (Option)* P95 Frost protection (standard or preheater) active? P96 Extractor (Option)* hood control active? Ventilation functions Activated / not activated Yes (1) / No (0) Yes (1) / No (0) Yes (1) / No (0) Post-heater active? Yes (1) / No (0) 0 10 V control active? Yes (1) / No (0) Yes (1) / No (0) Yes (1) / No (0) P97 Moisture control active? Yes (1) / No (0) 12 Instructions for the User

37 2 2.4 Use of the Switch(es) (Option) Leave the ComfoAir 350 at the highest position for some time after cooking and showering to remove excess moisture and odours as quickly as possible. If several position switches are installed in the apartment, the ComfoAir 350 adjusts as far as the ventilation is concerned to the highest ventilation position unless other values are set in an automatic software control Setting Ventilation Using 3-position Switch(es) A 3-position switch allows 3 ventilation levels to be set. Position 1 Low. - Use for a low ventilation requirement. Position 2 Normal. - Use for a normal ventilation requirement. Position 3 High. - Use this level during cooking, showering and when additional ventilation is required The CC Ease operating unit allows an additional ventilation level, the absence level, to be set in addition to these 3 ventilation levels. For further information, see section Setting Ventilation Using Bathroom Switch(es) A bathroom switch allows the ComfoAir 350 to be temporarily set to the highest ventilation level (position 3): Actuate the bathroom switch for maximum ventilation. Actuate the bathroom switch again to return to the normal (or previously set) ventilation level. You can set an activation and deactivation delay for the bathroom ventilation control in P menus P21 and P22. For further information, see section The bathroom ventilation control can also be integrated into the bathroom light switch. 2.5 Service by the User As user you have to service the ComfoAir 350 as follows: Clean or replace the fi lters. Clean the valves (in the home). These measures are described in more detail briefl y in the following sections. If these measures are not performed (regularly), there is a danger that the ComfoAir 350 will cease to function correctly. Instructions for the User 13

38 Cleaning or Replacing Filters As soon as the corresponding warning appears on the display of the CC Ease operating unit, the fi lters have to be cleaned or replaced. FILTER I The internal filters must be cleaned or replaced. FILTER E The external fi lters* must be cleaned or replaced. One of the fi lter indications shown above then appears on the CC Ease display. The internal filters are supplied as standard with the ComfoAir 350. The external filters* form part of the duct system of the ventilation system and do not belong to the ComfoAir 350. The ComfoAir 350 is equipped as standard with two internal fi lters. The external fi lters* form part of the duct system of the ventilation system and do not belong to the ComfoAir 350. Should your ventilation system be equipped with external fi l- ters, the monitoring of these fi lters must be connected to the PCB panel (extended version) of the ComfoAir 350. Monitoring of the external filters* must be connected to the PCB panel (extended version) of the ComfoAir 350 by the installer. B Push the fi lters (A) back into the ComfoAir 350. Insert the plug of the ComfoAir 350 into the plug socket again. Press " " to cancel the fi lter indication. For replacement... As soon as the fi lters have to be replaced, proceed as follows: Remove the mains plug from the plug socket. Pull the fi lters (A) out of the ComfoAir 350. A A Remove the clamps (C) holding the two filter cloths to the fi lter brackets. Push the fi lter cloths (D) off the filter brackets (F). For cleaning... You can clean the fi lters when necessary: Remove the mains plug from the plug socket. Pull the fi lters (A) out of the ComfoAir 350. C D Ensure that the cloth is not damaged by the corners of the filter bracket. A A Clean the fi lters (B) using a vacuum cleaner. Before putting the ComfoAir 350 into operation the first time, you should clean the filters (and the valves) because the ventilation system may have been soiled with building dust during the building phase. 14 Instructions for the User

39 2 Push the new fi lter cloths (E) over the fi lter brackets (F). Fasten the clamps (C) again. Push the fi lters (A) back into the ComfoAir 350. F E Insert the plug of the ComfoAir 350 into the plug socket again. Press " " to cancel the fi lter indication. Replace all filters (at least) once a year Cleaning Valves (in the Home) The ventilation system is equipped with the following valves: Ensure that you ALWAYS install all the valves in exactly the same position (and in the same ventilation slot in the wall or ceiling) after cleaning, otherwise optimum operation of the ventilation system cannot be assured. The ventilation air is admitted and discharged via valves. Gaps under the doors in the dwelling ensure that the air circulates in the right direction. In order to ensure that the right volume of ventilation air is maintained in the right rooms, pay attention to the following points: Do not seal the gaps. Do not change the setting of the valves. Do not interchange the valves. 2.6 Malfunctions A malfunction in the ComfoAir 350 is displayed as follows: A malfunction indication appears on the display of the CC Ease. The malfunction LED on the 3-position switch lights up. Exhaust air valve (STB) Exhaust air valve (STV) Exhaust air valve (STC) Exhaust air valve (STK) These measures are described in more detail in the following sections Malfunction indication on the CC Ease Display In the event of a malfunction, a malfunction code appears on the CC Ease display. The display then always shows an 'A' or 'E' code with the corresponding numbers. By referring to the overview of malfunctions in section 4.7.1, you can fi nd out what the particular malfunction indication means. Supply air valve (STH) These valves have to be cleaned (at least) twice a year. Remove the valve from the wall or ceiling. Clean the valve in a warm soap solution. Rinse the valve thoroughly and dry it carefully. Install the valve again EXACTLY IN THE SAME POSITION (and IN THE SAME HOLE). Repeat this procedure for the other valves. On the position of the valves... The installer has set all the valves so that the ventilation system operates optimally with respect to the volumetric air fl ows. Do not therefore change the setting of the valves position Switch with Malfunction LED In the event of a malfunction, 3-position switches with a malfunction LED start to light up. Depending on the type of 3-position switch, this takes place in one of two ways: 3-position switch with malfunction LED. The LED lights up in the event of a malfunction (and in the event of a fi lter warning). Wireless 3-position switch with malfunction LED. The LEDs light up as soon as the 3-position switch is used. The LED lights up green once to signal that a communication has been made. In the event of a malfunction or a 'Filter dirty' warning, both LEDs light up red three times. Finally both LEDs light Instructions for the User 15

40 2 up green again. The malfunction LED on the 3-position switch lights up not only in the event of malfunctions, but also in the event of a 'Filter dirty' warning What to Do in the Event of a Malfunction? In the event of a malfunction, please contact the installer. Note the malfunction code that appears on the display of the CC Ease operating unit. Also note your ComfoAir 350 type. It can be found on the identifi cation plate on the top of the ComfoAir 350. The plug must always remain in the plug socket as long as the ComfoAir 350 does not have to be shut down due to a serious malfunction, for fi lter cleaning or replacement or for some other urgent reason. If the plug were to be removed from the plug socket, the dwelling would no longer be mechanically ventilated and moisture as well as fungus problems could occur in the longer term. Avoid at all costs leaving the ComfoAir 350 switched off for prolonged periods. 2.7 End of Service Life Discuss with your supplier what you should do with your ComfoAir 350 at the end of its service life. If you cannot return the ComfoAir 350 to your supplier, do not simply throw it away; contact your local authorities to find out about possibilities of re-using components or the environmentally safe recycling of the materials. Do not throw the batteries of the wireless switches into the domestic refuse; dispose of them at the offi cial waste collection point. 16 Instructions for the User

41 3 Function of the System This chapter describes the design of the balanced ventilation system and its function in conjunction with the ComfoAir Components of the Balanced Ventilation System The complete balanced ventilation system consists of the following components: 2 ComfoAir 350 with CC Ease operating unit with software prepared for the connection of the following options: - Preheater. - Enthalpy exchanger (heat and moisture recovery). - 3-position switch without malfunction and fi lter display or 3-position switch with malfunction and fi lter display. - Wireless 3-position switch(es). - Bathroom switch. - Sensors with 0 10 V control (2x). Duct system. - Supply and exhaust air duct system. - Supply and exhaust air valves. Options that can only be connected to the ComfoAir 350 Luxury versions. - Exhausting via extractor hood. - Post-heater in duct system. - Sensors with 0 10 V control (2x). - Moisture sensor in living areas of the dwelling. - Geothermal heat exchanger. - Chimney sweep control with pressure sensor in the chimney. - Malfunction indication (with signal) (see wiring diagram). - ComfoControl Avignon (touch screen remote control with additional operating options compared with the CC Ease operating unit). These components/functions of the ventilation system are described in the following sections. 3.2 Controlled Ventilation System A balanced ventilation system generally consists of the following elements: ComfoAir 350 (A). Duct system for the intake of outside air (B) and the discharge of indoor air (C). Air supply valves in the living rooms and bedrooms (D). Exhaust air valves in the kitchen, bathroom, toilet and possibly the store room (E). Non-powered extractor hood with 3-position switch (F). B C A D E D D E E D F Instructions for the User 17

42 3 3.3 ComfoAir 350 The ComfoAir 350 consists as standard of the following components: Outer casing (A) of coated sheet steel. Inner lining (B) of high-quality expanded polypropylene (E)PP. 4 rotatable air-side connections (C) for the air ducts. 2 G3 fi lters (D) for air filtration. 2 energy-saving DC motors (E) with high-speed impeller. (High-efficiency) heat exchanger (with optional moisture exchanger) (F) with a thermal effi ciency exceeding 95% in which moisture as well as heat is recovered from the exhaust air. CC Ease operating unit (G) for reading off data and for settings. PCB panel (H2) with connections for the CC Ease operating unit, the enthalpy exchanger and the sensors with 0-10 V controller (2x). PCB panel (H1) with connections for the fans, bypass, preheater, temperature sensors (T1 to T4), 3-position switch with or without malfunction and fi lter display (option) and the bathroom switch (option). Identifi cation plate (I) with the data on the ComfoAir 350 (not visible). Condensation drain (J) for discharging the condensation from the warm exhaust air. Sticker (K) with the air connections (not visible). 230 V plug (L). K L C C I C C H2 D A H1 D E F B E G J 18 Function of the System

43 ComfoAir 350 Methods of Operation The ComfoAir 350 has been designed and produced as a system for controlled ventilation of residential buildings. It comprises two air fl ows that hygienically exchange their energy. 3 E G A I C H Filter J B F Polluted air is drawn off by the exhaust air fan (A) from, for example, the kitchen, toilet and shower (B). The heat exchanger (C) absorbs the heat from the exhaust air. The supply air fan (D) draws in fresh air from outside (E). The heat exchanger (C) heats up the intaken air using the heat absorbed from the exhaust air. If a moisture exchanger is installed (option), moisture is also transferred from the exhaust air to the supply air (for further information, see section 2.1.6). The heated fresh air is delivered into the living rooms and bedrooms (F). The now cooled polluted air from the kitchen, bathroom and toilet is discharged into the atmosphere (G). The bypass (H) allows the exhaust air to be discharged to the atmosphere without passing through the heat exchanger so that no heat is transferred to the fresh air (for further information, see section 2.1.3). The preheater (I) (option) ensures preheating of outside air so that balanced ventilation with heat recovery is assured even with moderate to severe frost (up to 150 m³/h at -15 C) (for further information, see section 3.4.2). The post-heater (J) (option) additionally heats the supply air (after it has already been heated in the heat exchanger) before it is delivered into the living rooms (for further information, see section 3.4.3). The balanced ventilation system contributes to energy saving, a healthy room climate and an optimum living climate and prevents problems with moisture Additional Options Only for ComfoAir 350 Luxury versions, with the exception of the preheater that can be installed in any ComfoAir 350. Please refer to the identification plate on the top of the ComfoAir 350 to determine whether you have a basic or luxury version of the system. These are external devices that can be connected to the ComfoAir 350 Luxury versions (preheater also to Basic versions) Preheater in ComfoAir 350 All ComfoAir 350 systems with VV in the device name (see identifi cation plate on the top of the ComfoAir 350) are equipped as standard with a preheater. All other ComfoAir 350 versions can be equipped with a preheater as an option. The preheater is a heating element that is installed in the outside air duct of the ComfoAir 350 just upline of the heat exchanger. The preheater heats the cold outside air before it reaches the heat exchanger in the event of moderate to severe frost. In this way the heat exchanger is protected against freezing in addition to the standard frost protection system. The advantage of the preheater compared with the standard frost protection system is that balanced ventilation can be maintained even in the event of frost. In the event of a frost risk, the intake of out- D Function of the System 19

44 3 side air no longer has to be temporarily reduced (or even interrupted for a short time) in order to prevent condensation freezing in the heat exchanger. Instead the preheater is temporarily switched on. In addition, this option offers greater comfort as the supply air is preheated to more or less room temperature. The preheater is switched on and off automatically. As soon as the temperature of the outside air is below 0 o C for a certain period, the air duct of the preheater is opened and the preheater is switched on to heat the intaken outside air to at least 1 o C. Here a temperature sensor in the supply air duct of the ComfoAir 350 measures the temperature. This preheating control ensures balanced ventilation up to a maximum of 150 m³/h at -15 o C. The user cannot influence the automatic preheater control. The installer has to modify the preheating control, for example during installation of the ComfoAir 350, in menu P52 via the CC Ease operating unit (for further information, see section 4.4). The preheater and the corresponding temperature sensor must be connected to the PCB panel behind the front panel of the ComfoAir 350 by the installer. In the event of retrofi tting, installation instructions are supplied with the installation kit Ventilation via Extractor Hood* An extractor hood can be connected to the ComfoAir 350. This allows moisture (steam) and food odours to be discharged as quickly as possible via the ventilation system. For this, the extractor hood must be connected to the PCB panel (extended version) of the ComfoAir 350. The extractor hood can then be operated via the CC Ease operating unit of the ComfoAir 350. Switching the extractor hood on and off, see section In addition to this ventilation via the extractor hood, a temperature sensor is also installed in the extractor hood. This temperature sensor measures the temperature of the air discharged via the extractor hood. Should this temperature become too high, i.e. more than 60 o C, the valve in the extractor hood will close to protect the ComfoAir 350 and in particular the heat/moisture exchanger Post-heater* in Duct System As an option, the ventilation system can also be equipped with a post-heater. The post-heater is a heater element that is installed in the duct system of the ventilation system, in other words downstream of the ComfoAir Menu P29: Setting the rate of increase Rate of increase Minimum 1% Rate of increase Standard 10% Rate of increase Maximum 99% 350. The post-heater ensures that after the outside air has first been heated in the heat/moisture exchanger of the ComfoAir 350, the supply air is additionally heated before it enters the living rooms. The advantage of the post-heater is that the supply air can be directly admitted to the living rooms at the comfort temperature set for the dwelling. That means additional comfort. The post-heater is not supplied as standard with the ComfoAir 350. It is actually part of the duct system of the ventilation system and does not belong to the scope of supply of the ComfoAir 350. The post-heater is switched on and off automatically. As soon as the temperature of the supply air drops below the set comfort temperature, the post-heater is switched on to heat up the supply air to the comfort temperature. A temperature sensor As soon as the extractor hood is switched on using the CC Ease operating unit, the valve of the extractor hood opens and the ComfoAir 350 switches to the 'Extractor hood' function. Ventilation positions 1, 2 or 3 can be set. These ventilation positions for the extractor hood correspond to the 'normal' ventilation positions. Please note, however, that these ventilation positions for the extractor hood are always slightly higher (by x%) than the 'normal' ventilation positions. The user can set this x% value himself in menu P29 on the CC Ease operating unit (see also section 2.3.7). The following increase values can be selected: in the duct system measures the temperature of the supply air immediately behind the post-heater. The user cannot infl uence the automatic postheater control system. The post-heater reacts to 20 Function of the System

45 3 the set comfort temperature. This temperature can, however, be altered by the user (for further information, see section 2.3.2). The installer simply has to indicate whether or not a post-heater has been integrated into the ventilation system in menu P55 of the CC Ease operating unit during installation of the ComfoAir 350 (for further information, see section 4.4). The post-heater and the corresponding temperature sensor must be connected to the PCB panel (extended version) of the ComfoAir 350 by the installer CO2 Sensor* in the Home A CO2 sensor can be connected to the ComfoAir 350. This CO2 sensor allows the ComfoAir 350 to regulate the CO2 concentration in the house. For this, a CO2 sensor is installed in one of the living rooms to measure the current CO2 concentration in the indoor air. air fan, and (b) the old air is drawn off faster by the exhaust air fan. As soon as the CO2 concentration in the house has reached acceptable values again, the settings of the two fans are gradually reduced again. The CO2 sensor must be connected to the PCB panel in the electronics casing on the top of the ComfoAir 350 by the installer. Living space Living space Living space Living space If the CO2 concentration is too high compared with the set (and hence highest admissible) CO2 concentration, the settings of the supply and exhaust air fans will be gradually increased to reduce the CO2 concentration. In this way the air in rooms with a high carbon dioxide concentration that can occur, for example, during a party with a large number of people, can be quickly 'exchanged' by additional ventilation. The user can set the maximum admissible CO2 content (within the given limits) himself in menu P27 via the CC Ease operating unit (see also section 2.3.7). The following CO2 concentrations can be set: Menu P27: Setting CO2 concentration CO 2 concentration Minimum ppm to be decided CO 2 concentration Standard ppm to be decided CO 2 concentration Maximum ppm to be decided The starting point for this CO2 control is the assumption that the outside air is generally the fresh(er) air. The CO2 concentration can be reduced by this system in that (a) fresh air is drawn in faster with the supply RH Sensor* in the Home A RH sensor can be connected to the ComfoAir 350. This RH sensor allows the ComfoAir 350 to regulate the relative humidity in the house. For this, an RH sensor is installed in one of the living rooms to measure the current relative humidity of the indoor air. If the humidity is too high compared with the set (and hence highest admissible) humidity, the settings of the supply and exhaust air fans will be gradually increased to reduce the humidity. Living rooms with an excessively high humidity, such as bathrooms during showering, are quickly freed of the humidity by the additional ventilation. Problems due to high humidity can thus be avoided in this way. The user can set the maximum admissible humidity (within the given limits) manually in menu P28 via the CC Ease operating unit (see also section 2.3.7). The following humidity levels can be selected: Menu P28: Setting the humidity level Humidity level Minimum 0% Humidity level Standard 60% Humidity level Maximum 100% The starting point for this humidity control is the assumption that the outside air is generally the dry (drier) air. The humidity can be reduced by this system in that (a) dry air is drawn in faster with the supply air fan, and (b) the humid air is drawn off faster by the exhaust air fan. As soon as the humidity in the dwelling has reached acceptable values again, the settings of the two fans are gradually reduced again. Function of the System 21

46 3 The RH sensor must be connected to the PCB panel in the electronics casing on the top of the ComfoAir 350 by the installer Underground Geothermal Heat Exchanger* As an option, the ventilation system can also be equipped with a geothermal heat exchanger. The geothermal heat exchanger is an additional underground air duct at a depth of at least 1 metre and with a length of 20 to 40 metres that forms part of the ventilation system. The geothermal heat exchanger allows the outside air to be admitted to the house under ground instead of above ground. The heat of the soil is thereby given off to the outside air as it flows through the geothermal heat exchanger. The geothermal heat exchanger is thus an outstanding solution both in winter and in summer. In frosty weather, the outside air can be heated by the underground geothermal heat exchanger before it enters the house via the ComfoAir 350. During hot weather in the summer, on the other hand, the outside air can be cooled by the underground geothermal heat exchanger before it enters the house via the ComfoAir 350. The geothermal heat exchanger functions automatically. A temperature sensor installed anywhere on the outside of the house measures the temperature of the outside air. As soon as can modify the automatic control of the geothermal heat exchanger to a slight extent in menu P61 at the CC Ease operating unit, if necessary. The geothermal heat exchanger and the corresponding temperature sensor must be connected to the PCB panel (extended version) of the ComfoAir 350 by the installer Chimney Sweep Control Apart from the chimney sweep control set as standard in the software, an additional unit can be connected to the PCB panel (extended version) of the ComfoAir 350 as an option that can switch off the fans of the ComfoAir 350 via a floating contact. By means of a pressure sensor installed in the room in which the hearth to be monitored is installed, the unit measures the pressure in the room with the hearth. The pressure in the room in which the hearth is installed and the adjacent rooms must not exceed - 4 Pa so that fumes and smoke cannot enter the house. At a pressure higher than - 4 Pa, the fans of the ComfoAir 350 are switched off. Malfunction code "E4" appears on the display. In this case, please contact the installation company that installed the pressure sensor and/or the heating. There is probably a problem with the discharge of the fumes from the hearth. The additional unit and the corresponding pressure sensor do not belong to the standard scope of supply of the ComfoAir 350. The additional unit and the corresponding pressure sensor must be connected to the PCB panel (extended version) of the ComfoAir 350 by the installer. the temperature of the outside air is between 0 and 15 o C in winter months and between 10 and 25 o C in summer months, the geothermal heat exchanger is activated to allow the outside air to fl ow through the heat exchanger. The user cannot infl uence the automatic geothermal heat exchanger control system. The installer simply has to indicate whether or not a geothermal heat exchanger has been integrated into the ventilation system in menu P60 of the CC Ease operating unit during installation of the ComfoAir 350 (for further information, see section 4.4). The installer The installer cannot infl uence the automatic chimney sweep control system. It reacts to settings at the PCB panel (extended version) stored in the software. The installer simply has to indicate whether or not a chimney sweep control system has been integrated into the ventilation system in menu P50 of the CC Ease operating unit during installation of the ComfoAir 350 (for further information, see section 4.4). 22 Function of the System

47 Technical Specifications ComfoAir 350 nl (normal Air Volume) Position Ventilation rate Value Absent Low Medium High Maximum at at at at at Power supply Supply voltage Power factor (cos phi) Noise output supply air fan Position Ventilation rate Value Absent Low Medium High Maximum at at at at at Noise output exhaust air fan Position Ventilation rate Value Absent Low Medium High Maximum at at at at at Function of the System 23

48 3 ComfoAir 350 nl (normal Air Volume) Position Absent Low Medium High Maximum Ventilation rate at at at at at Value Supply voltage Power supply Power factor (cos phi) Noise output supply air fan Position Ventilation rate Value Absent Low Medium High Maximum at at at at at Noise output exhaust air fan Position Ventilation rate Value Absent Low Medium High Maximum at at at at at General specifications of the ComfoAir 350 HE exchanger material Polystyrene Inner lining material Heating capacity Weight 24 Function of the System

49 3 3.6 Dimension Sketch Function of the System 25

50 3 4 Instructions for the Installer This chapter describes how you have to install the ComfoAir Preconditions for Installation In order to be able to assess whether the ComfoAir 350 can be installed in a particular room, please pay attention to the following points: The ComfoAir 350 must be installed in accordance with the local safety regulations and installation instructions of i.a. the public utilities, and in accordance with the instructions in this manual. The installation location must be selected such that there is suffi cient space around the ComfoAir 350 for air connections and for carrying out maintenance work. The following installations must be present in the room: - Air duct connections V power supply with fused wall plug socket. - Installations for condensation drainage. Roof openings must be air and vapour-tight. The outside air and exhaust air ducts must be insulated vapour-tight between the roof/gable opening and the ComfoAir 350. This prevents the formation of condensation on the outside of the ducts. The exhaust air duct must have a doublewalled or insulated roof opening. This prevents the formation of condensation between the layers of the roof. The exhaust air duct must be laid with a gradient towards the ComfoAir 350. The ComfoAir 350 must be installed in a frostfree room. The condensation must be discharged frost-free, with a downward gradient and using a siphon. The ComfoAir 350 must be fi rmly connected to the siphon. The ComfoAir 350 may only be connected to a non-powered extractor hood. Any other type of extractor hood system would interfere with the basic function of the balanced ventilation system. We recommend that silencers are installed on both the air intake and air discharge sides of the ComfoAir 350. For further information, please contact your supplier. In order to ensure a good and draught-free ventilation of the dwelling, gaps were deliberately left under the inside doors. If these gaps are sealed, for example with door seals or highpile carpets, the ventilation in the apartment will stagnate. This would prevent the system from operating optimally. 4.2 Installation of the ComfoAir Transport and Unpacking Work carefully when transporting and unpacking the ComfoAir 350. Ensure that the packaging materials are disposed of in an environmentally favourable manner Checking the Scope of Supply Should you discover any damage or missing parts of the supply product, please contact your supplier without delay. The scope of supply includes: ComfoAir 350. Check the identifi cation plate to see whether it is the correct type. 4 x 45 connection elbows. Mounting brackets. Operating Manual. The ComfoAir 350 is available in the following types: Type ComfoAir 350 L ComfoAir 350 R ComfoAir 350 L VV ComfoAir 350 R VV ComfoAir 350 L Luxe ComfoAir 350 R Luxe Type ComfoAir 350 L Luxe VV ComfoAir 350 R Luxe VV ComfoAir 350 L Luxe CC ComfoAir 350 R Luxe CC ComfoAir 350 L Luxe CC VV ComfoAir 350 R Luxe CC VV Meaning of the suffi xes: L = Left. R = Right. VV = Preheater. Luxe = Refers to the extended version of the PCB panel. CC = ComfoControl Avignon. This is the touch screen remote control with additional operating options compared with the CC Ease operating unit. 26 Function of the System

51 4 No space is required to the sides of the ComfoAir 350 for its proper operation. Exhaust air Supply air Stale air Outside air Do not install the ComfoAir 350 with a side against a wall to avoid possible contact noise Connection of the Air Ducts ComfoAir 350 LEFT Outside air Intake air Stale air ComfoAir 350 RIGHT Exhaust air Install a suitable silencer directly at the air intake and air discharge connections. Information on silencers is available from your supplier. The air ducts to be connected, minimum diameter 150 mm, must be installed with as little air resistance as possible and air tight. 4.3 Wall Mounting Insulate the outside air duct and the stale air duct vapour-tight between the roof/gable opening and the ComfoAir 350. This prevents the formation of condensation on the outside of the ducts. Install the exhaust air duct with a gradient towards the ComfoAir Connection of the Condensation Drain Install the ComfoAir 350 on a wall with a load-bearing capacity of at least 200 kg/m². For other walls we recommend the use of a base for installation on the fl oor (available as an option, see section 4.8 with service parts). This helps to avoid the transmission of structure-borne noise. Fasten the supplied mounting bracket to the wall horizontally. Connect the condensation drain (not supplied) to the underside of the ComfoAir 350. The value shown of 235 mm is only an indicative value. The actual value depends on the type of condensation drain selected, see also section for the connection of the condensation drain. Ensure that at least 1 metre of space is left in front of the ComfoAir 350 for later maintenance work. LEFT Connection Instructions for the Installer 27

52 4 n Connection Commissioning can be carried out with the P menus via the CC Ease operating unit. These P menus allow various settings (in particular for ventilation control) to be selected for the ComfoAir 350. An overview of the available P menus is given below: RIGHT The warm exhaust air is cooled by the outside air in the heat exchanger. As a result, the moisture contained in the room air condenses in the heat exchanger. The condensation forming in the heat exchanger is discharged via the condensation tray into the condensation drain. The connection for the condensation drain has an outside diameter of 32 mm. This is located on the underside of the ComfoAir 350. Connect the condensation drain to the water lock of the home drainage system using a pipe or hose. Position the upper edge of the water lock at least 40 mm below the condensation drain of the ComfoAir 350. Ensure that the end of the pipe or hose ends under the water level. Ensure that the water lock of the connection to the house sewage system is always fi lled with water. Ensure that the hose end terminates at least 60 mm below the water level. This will prevent the ComfoAir 350 from drawing in air. 4.4 Commissioning the ComfoAir 350 The ComfoAir 350 can be put into operation after installation. Menu Possibilities P1 Read off the status (from menu P2) P2 Set time delays (and indication FILTER DIRTY and setting values for extractor hood and sensors) P3 Setting the ventilation levels P4 Read off the temperature, relative humidity and CO2 concentration. P5 Setting additional control functions P6 Setting additional control functions P7 Read off and reset malfunctions (and system information) P8 Setting 0-10 V connections P9 Read off the status (from menu P5) The P menus P1, P2 and P9 are accessible for the user and serve mainly for reading off statuses and for setting time delays. For further information, see section The remaining P menus P3 to P7 are reserved exclusively for the installer. In the P menus the user may: - only set the additional functions P1, P2 and P9. The remaining P menus P3 to P7 are reserved for the installer. Access to the P menus Proceed as follows: 1 Press simultaneously on " " and " ". 2 Wait until the "P menu" appears on the display. The P menus P1, P2 and P9 are now accessible. 28 Instructions for the Installer

53 4 3 Press " " and " " simultaneously for 2 seconds. 4 Wait until the "P menu" P3 appears on the display. The P menus P3 to P8 are now accessible. " ". 10 Press " " to confi rm the value. 11 Repeat steps 7 to 10 to set several parameters in turn in the same P menu. Or Return to the P menu: Press " " once. Or Return to the main window 1 Press " " twice. 5 Select with " " or " " the desired P menu, e.g. " 5 ". 6 Press " " to confi rm the P menu. 7 Select with " " or " " the desired P submenu, e.g. " 51 ". 8 Press " " to confi rm the P sub-menu. Making settings in the P menus The minimum and maximum values for the available setting parameters are stored in the software. 9 Select a value for the parameter with " " or Instructions for the Installer 29

54 4 Menu P3 Set ventilation controls Values for ventilation controls Sub-menu Description Minimum Maximum Standard P30 Setting the power (in %) of the exhaust air 0% 97% Normal / High fan in position "Absent". 15% / 15% P31 Setting the power (in %) of the exhaust air 16% 98% Normal / High fan in position "Low". 35% / 40% P32 Setting the power (in %) of the exhaust air 17% 99% Normal / High fan in position "Medium". 50% / 70% P33 Setting the power (in %) of the exhaust air 18% 100% Normal / High fan in position "High". 70% / 90% P34 Setting the power (in %) of the supply air 0% 97% Normal / High fan in position "Absent". 15% / 15% P35 Setting the power (in %) of the supply air 16% 98% Normal / High fan in position "Low". 35% / 40% P36 Setting the power (in %) of the supply air 17% 99% Normal / High fan in position "Medium". 50% / 70% P37 Setting the power (in %) of the supply air 18% 100% Normal / High fan in position "High". 70% / 90% P38 Current power (in %) of the exhaust air - - Current % fan. P39 Current power (in %) of the supply air fan. - - Current % Menu P4 Read off the temperatures (% and ppm) Read off the temperatures (% and ppm) Sub-menu Description Minimum Maximum Standard P40 Current value of TPOST-HEATER - - Current o C P41 Comfort temperature 12 o C 28 o C 20 o C P42 Current value CO Current ppm P43 Current value relative humidity. - - Current % P44 Current value of TEXTRACTOR HOOD - - Current o C P45 Current value of T1 - - Current o C (= temperature of the outside air) P46 Current value of T2 - - Current o C (= temperature of the supply air) P47 Current value of T3 Current o C (= temperature of the exhaust air) P48 Current value of T4 Current o C (= temperature of the stale air) P49 Current value of TGHE (= temperature of the outside air for geothermal heat exchanger) Current o C 30 Instructions for the Installer

55 4 Menu P5 Setting additional control functions Values for additional control functions Sub-menu Description Minimum Maximum Standard P50 Activation of 0 (= No) 1 (= Yes) 0 the chimney sweep control system. P51 Indicate whether 0 (= No) 1 (= Yes) 0 preheater is installed. Note: change only if a preheater was subsequently installed. If the ComfoAir 350 has to be reset to the works settings via P75, a subsequently installed preheater will be reset as standard to "ABSENT". Check the presence of the preheater after a general reset via menu P75. P52 Setting the preheater control. Level 0 Particularly safe setting. Level 1 Safe setting. Level 2 Nominal setting. Level 3 Economy setting. Note: The PREHEATER IS SWITCHED ON EARLIEST WITH THE particularly safe setting. This level thus offers the greatest safety for maintaining balanced ventilation. On the other hand, the preheater is switched on the latest in the ECONOMY SETTING. This level thus offers the least safety for maintaining balanced ventilation. During commissioning of the ComfoAir 350, the preheater control can generally be left on Level 2: NOMINAL SETTING (= works setting). Only in areas with cold winters (with daytime temperatures regularly approx. -10 C or below) should Level 1: SAFE SETTING or even Level 0: PARTICU- LARLY SAFE SETTINGS be selected. Values for additional control functions Sub-menu Description Minimum Maximum Standard P53 Indicate presence of an extractor hood. 0 (= No) 1 (= Yes) 0 P54 Note: If an extractor hood is connected to the ventilation system, the user can set the ventilation levels for the extractor hood via P29. Indicate presence of a bypass. 0 (= No) 1 (= Yes) 1 Note: The ComfoAir 350 is equipped with a bypass as standard. The value can therefore be left at '1'. P55 Indicate presence of a post-heater. 0 (= No) 1 (= Yes) 0 P56 Setting the necessary air volume for the nl HL nl dwelling. nl: "Normal air volume". HL: "High air volume". Note: Setting the air volume in P56 (to "nl" or "HL") forms the basis for setting the air specifications and hence for setting the fans. For further information, see section 4.5 and P30 to P37. Instructions for the Installer 31

56 4 Values for additional control functions Sub-menu Description Minimum Maximum Standard P57 Setting the ComfoAir 350 Type. Li = Left-hand version. Re = Right-hand version. Li Re Li P58 (Not yet available) Note: The ComfoAir 350 is set correctly at the factory. Refer also to the identification plate for these data. Setting the fan type. 0 = Standard. 1 = Constant volume. 2 = Constant pressure Note: The ComfoAir 350 is set correctly at the factory. Constant volume or constant pressure fans cannot be installed subsequently. P59 Enthalpy exchanger installed 0 (= No) 1 (= Yes) with moisture sensor 2 (= Yes) without moisture sensor Menu P6 Setting additional control functions Values for additional control functions Sub-menu Description Minimum Maximum Standard P60 Indicate presence of a 0 (= No) 1 (= Yes) 0 geothermal heat exchanger (GHE). P61 Setting the percentage that the supply 0% 99% 0% air fan must run higher when the valve of the geothermal heat exchanger (EWT) is open. P62 Tghe, low 0% 15% 7% P63 Tghe, high 10% 25% 23% P64 Tnaheater, desired 5% 40% 18% Menu P7 Read off malfunctions (and system information) Values (malfunction) information Sub-menu Description Minimum Maximum Standard P70 Current software version. Software version number P71 Last malfunction. Code corresponding to alarm and malfunction display (see section 4.7) P72 Last malfunction but one Code corresponding to alarm and malfunction display (see section 4.7) P73 Last malfunction but two Code corresponding to alarm and malfunction display (see section 4.7) P74 Reset a malfunction on the ComfoAir Instructions for the Installer

57 4 Values (malfunction) information Sub-menu Description Minimum Maximum Standard P75 Complete reset Press " " for 5 seconds to carry out a complete reset. A complete reset returns all settings to the original works settings. After a complete reset, the ComfoAir 350 prompts you to enter nl / HL (see P56) and Li / Re (see P57) again. After a complete reset, all settings in menus P2 and P3 and the existing controls P5 and P6 have to be made again. If the ComfoAir 350 is equipped with a preheater, this must be logged in again in menu P51, as it is set to "Logged out" as standard after a complete reset. P76 Self-test of the ComfoAir Explanation The ComfoAir 350 switches to the highest level immediately after activation of the self-test. In addition, the bypass valve opens and closes immediately after activation of the self-test. If this self-test is completed without malfunctions, the valve of the preheater (if installed) then opens and closes. Menu P8 Open-loop and closed-loop control Selection between open-loop and closed-loop control Sub-menu Description P80 0= Open-loop control 1 = Closed-loop control (by analogy with input 1) P81 0= Open-loop control 1 = Closed-loop control (by analogy with input 2) P82 Min. setting by analogy with input 1 P83 Max. setting by analogy with input 1 P84 Min. setting by analogy with input 2 P85 Max. setting by analogy with input 2 Max Min 0 V 10 Instructions for the Installer 33

58 4 4.5 Setting the Air Specifications The ComfoAir 350 must be set after installation. This can be performed using the air specifi cations of the ComfoAir 350 shown above. Setting the normal air volume nl corresponds to the presetting of the G 90. Setting the normal air volume nl corresponds to the presetting of the G 91. The standard settings of the ComfoAir 350, nl, are as follows: Position ABSENT 15% Position LOW 35% Position MEDIUM 50% Position HIGH 70% The standard settings of the ComfoAir 350, HL, are as follows: Position ABSENT 15% Position LOW 40% Position MEDIUM 70% Position HIGH 90% To set the ComfoAir 350 (after installation), proceed as follows: Switch the ComfoAir 350 to the setting mode. Press simultaneously for two seconds on " " and " ". Wait until "InR" appears on the CC Ease display. In setting mode, bypass and preheater are always deactivated. The ComfoAir 350 switches the setting mode off again automatically after 30 minutes. Close all windows and outside doors. Close all inside doors. Check the presence of air circulation systems in the building (at least 12 cm 2 per l/s). The air circulation systems in the building must achieve at least 12 cm 2 per l/s. Check whether both fans function in the three speed ranges. Switch the ComfoAir 350 to the high position. Install all the valves and set them according to the instructions or as in the reference dwelling. If no data are known: Install the valves and open them as far as possible. Measure the air volumes, fi rst the supply air and then the exhaust air. differ by more than approx. 10% from the nominal air volumes and the majority of the deviations are in the plus range, adjust the fan so that all the deviations are in the plus range. If the majority of the deviations are in the minus range, adapt all the deviations so that they are all in the minus range. Ensure also that a supply and an exhaust valve remain fully open. Change the fan settings in the P menus P30 to P37 via the CC Ease operating unit. Select the lowest possible setting in order to minimise energy consumption. Ensure that the ratio of the air volumes between high, medium and low remains the same. Use the ComfoAir 350 air specification diagram for setting the fans. If the previously set air volumes still differ too much: Adjust the valves further. Check the whole system again after adjustment of all the valve stages. Switch the ComfoAir 350 (back) to ventilation position Maintenance by the Installer As installer you have to service the ComfoAir 350 as follows: Inspect the heat exchangers and fans Clean the fi lter if a preheater is installed. These measures are described in more detail briefl y in the following sections. If these measures are not performed (regularly), there is a danger that the ComfoAir 350 will cease to function correctly Inspection of Heat Exchanger and Fans The fans and the heat exchanger must be inspected every 4 years. Remove the mains plug (A) from the plug socket. Pull the fi lters (B) out of the ComfoAir 350. Remove the front plate by removing the screws (C). Push the front plate in the direction of the arrow and remove it from the ComfoAir 350. Remove the sealing plate by removing the screws (D). 34 Instructions for the Installer

59 4 A Designated as R B E G C F Right-hand version Then: Remove the heat exchanger (F) from the drain plate (G). D During installation of the sealing plate, its underside must first be inserted behind the raised edge so that a good seal is achieved. ComfoAir 350 L Pull the tape (E) to remove the heat exchanger (F) and the drain plate (G). Remove the bypass duct (H) on the left-hand version of the ComfoAir 350. ComfoAir 350 R Remove the bypass duct (H) on the right-hand version of the ComfoAir 350. Pull the tape (E) to remove the heat exchanger (F) and the drain plate (G). Caution! There may still be water in the heat exchanger! Clean the heat exchanger (F), if necessary. Immerse the heat exchanger in warm water (max. 40 C) to clean. Finally rinse the heat exchanger thoroughly with warm tap water (max. 40 C). Hold the heat exchanger with both hands at the green side surfaces and shake out all the water. Caution! On no account should aggressive or solvent-based cleaning agents be used. Do not install the heat exchanger yet (the fans can be removed, inspected and cleaned, if necessary, in the following steps). If an enthalpy heat exchanger is installed, observe the corresponding instruction. E F B Left-hand version G Designated as L Do not install the heat exchanger yet if the fans are also to be inspected. The following section describes how to remove, inspect and clean the fans, if necessary, after the heat exchanger: Remove the plastic plate (I) in front of the PCB panel by loosening the two screws. Loosen the connectors (J) and the earth cable (J) at the PCB panel and remove the cables with the two grommets (K) completely. Remove the complete fan casing (L) by pressing in the tabs (M). Remove the inlet neck (N) by pressing in the tabs around the fan casing. Clean the fans (O). Instructions for the Installer 35

60 4 K L J I The bottom is secured in the electronic carriage by 4 tabs. Two tabs are located on the front side (visible) and two on the rear side (not visible). Clean the fi lter using a brush. Remove any caked soiling with a damp cloth. Install all the parts again in the reverse order. Carry out the self-test described under P76, see section 4.4. M O N Install the drain plate (G) again correctly under the heat exchanger. The holes in the drain plate must be on the side of the condensation drain. Use a soft brush to clean the fan blades. Tighten the screws to a maximum torque of 1.5 Nm. This corresponds to roughly level 2 of a normal screw drill. Remove dust using a vacuum cleaner. Caution! Take care not to damage the fan blades. Caution! Take care not to damage the temperature sensor. Install all the parts again in the reverse order. Carry out the self-test described under P76, see section 4.4. Install the drain plate (G) again correctly under the heat exchanger. The holes in the drain plate must be on the side of the condensation drain. Tighten the screws to a maximum torque of 1.5 Nm. This corresponds to roughly level 2 of a normal screw drill Filter Cleaning, if Preheater is Fitted The filter of the preheater (if installed) must be cleaned every 4 years. Remove the mains plug (A) from the plug socket. Pull the fi lters (B) out of the ComfoAir 350. Remove the front plate by removing the screws (C). Push the front plate in the direction of the arrow and remove it from the ComfoAir 350. Remove the sealing plate by removing the screws (D). Remove the plastic plate (I) in front of the PCB panel by loosening the two screws. Loosen the connectors (J) and the earth cable (J) at the PCB panel and remove the cables with the two grommets (K) completely. Remove the cable (P) of the PCB panel. Remove the bottom (Q) of the preheater. 36 Instructions for the Installer

61 4 4.7 Malfunctions In the event of a malfunction in the ComfoAir 350: A malfunction indication normally appears on the display of the CC Ease operating unit. Not all malfunction indications appear on the CC Ease display, however, even when there is a malfunction (or problem). Both types of malfunction (or problem) are described briefl y in the following sections Malfunction Indications on the CC Ease Display The following table contains an overview of the malfunction indications that are shown on the CC Ease display. Code A0 A1 A2 A3 A4 A5 A6 A7 A8 A10 A11 E1 E2 E3 EA1 EA2 Description NTC sensor TEWT defective. NTC sensor T1 defective. (= temperature of the outside air) NTC sensor T2 defective. (= temperature of the supply air) NTC sensor T3 defective. (= temperature of the return air) NTC sensor T4 defective. (= temperature of the exhaust air) Bypass motor malfunction. Preheater motor malfunction. Preheater does not heat up suffi ciently. Preheater becomes too hot. NTC sensor Tch defective. NTC sensor Trh defective. Exhaust air fan not running (M1). Supply air fan not running (M2). Temperature sensor extractor hood too high. Enthalpy sensor measures excessively high moisture values. No communication with the enthalpy sensor. Caution! The electrical connections must not come into contact with moisture. Pay attention during installation of the heat exchanger and drain plate that the condensation drain is on the same side as the condensation drain fitting. Inspect the components of the condensation drain every 2 years. Instructions for the Installer 37

62 Malfunction indications on the CC Ease Display à Remedy This section contains tips on remedying the malfunctions described in section that can appear on the CC Ease display. FiL ter in display Remove plug from socket Clean or replace filter Mount filter with the rounded part of the handle pointing downwards Reinsert the plug in the socket Press until FiL ter disappears CAUTION! Avoid contact with the PCB and frost protection element due to risk of electrocution E1 / E2 Exhaust air/supply air fan malfunction Remove the filter, the plastic front cover and the metal cover Yes Do the fan connection and the PCB register 230 VAC? No Then initiate the self-test (P76 on 1) Replace the PCB CAUTION: Reset unit Yes Do the fan and the PCB register current ( VDC)? No Remove the heat exchanger and the foam part of the bypass and replace the fan Replace the PCB CAUTION: Reset unit Left-hand or right-hand version of the ComfoAir 350? See illustration on plastic cover for location of PCB CA 350 Left: Supply fan left CA 350 Right: Supply fan right 38 Instructions for the Installer

63 4 Caution! Avoid contact with the PCB and frost protection element due to risk of electrocution E3 Extractor hood temperature sensor too high. Yes Is something cooking on the hob? No Turn hob off and remove item from heat source Yes Resistance OK? No Replace PCB Caution: Reset unit! Replace temperature sensor Caution! Avoid contact with the PCB and frost protection element due to risk of electrocution E4 ComfoAir 350 switched off via external switch Cause depends on unit connected to the ComfoAir 350: check the connected unit. EA1 Moisture sensor registers >60% relative humidity in exhaust air. Consult the user; fit standard heat exchanger?? Caution! Avoid contact with the PCB and frost protection element due to risk of electrocution EA2 Cannot read out moisture sensor Yes Check sensor resistance Connection between sensor and PCB OK? No Repair connection Yes Replace PCB Caution: Reset unit! Resistance OK? No Replace temperature sensor Instructions for the Installer 39

64 4 CAUTION! Avoid contact with the PCB and frost protection element due to risk of electrocution A1 / A2 / A3 / A4 Temperature sensor malfunction T1 / T2 / T3 / T4 Remove the plug from the socket Remove the filter, the plastic front cover and the metal cover Remove temperature sensor from the PCB Check temperature sensor resistance; see table Resistance [KΩ Yes Is resistance OK? No Replace the PCB CAUTION: Reset unit! Replace the temperature sensor A5 / A6 Motor bypass / frost protection element malfunction Remove the filter, the plastic front cover and the metal cover Then initiate the self-test (P76 on 1) Yes Is the motor running? No Remove the motor and the cog (incl. plastic part) Check connection and PCB; 12 VDC if motor is running (see menu P76) Yes Is the cog defective? No Yes Does the PCB register current? No Replace cog Replace motor Replace motor Replace the PCB CAUTION: Reset unit! 40 Instructions for the Installer

65 4 CAUTION! Avoid contact with the PCB and frost protection element due to risk of electrocution A7 Malfunction Frost protection element does not warm up (sufficiently) Remove the plug from the socket Remove the filter, the plastic front cover and the metal cover Remove the plug of frost protection element from the PCB Yes Is the resistance of the plug of the frost protection element > 300 ohm? No Remove the heat exchanger and the frost protection element (and also the foam part in case of right-hand version) Yes Is resistance of T1 OK? No Replace the PCB Yes Is the resistance of the cable of the frost protection element infinite? No Replace T1 temperature sensor If fuse is blown, replace cable Check resistance of the cable and check connections with the frost protection element CAUTION! Avoid contact with the PCB and frost protection element due to risk of electrocution A8 Malfunction Frost protection element gets too hot Remove the filter, the plastic front cover and the metal cover Yes Does the frost protection element flap work properly? (Check with P76) No Check the following factors: - Fan settings (too low?) - Supply air valves (opened too wide?) - The entire duct system (blockage?) See A5 / A6 Malfunction section Initiate self-test Instructions for the Installer 41

66 4 CAUTION! Avoid contact with the PCB and frost protection element due to risk of electrocution A0 / A10 / A11 Malfunction Temperature sensor T ghe / T CH / T AH Check temperature sensor resistance; see table Temp. Resistance [ C] [KΩ] ( C) MIN. MED. MAX Yes Resistance OK? No Replace PCB Caution: Reset unit! Replace temperature sensor Instructions for the Installer

67 4.7.3 Malfunctions (or Problems) without Indications This section gives an overview of the malfunctions (or problems) that are not displayed on the CC Ease display. 4 Problem/Malfunction Cause Check / measure All OFF Supply voltage Check the fuse on the PCB panel. If the fuse is OK, the circuit board is defective. High air delivery temperature in summer Low air delivery temperature in winter No or insuffi cient air supply, shower remains wet No supply voltage Bypass remains closed Bypass remains open Filter clogged Valves clogged Heat exchanger clogged by dirt. Heat exchanger frozen Fan dirty Ventilation ducts clogged ComfoAir 350 in frost mode Too noisy Fan bearings defective Replace Fan settings Scraping noise Siphon is empty Siphon does not seal Whistling noise An air leak somewhere in the system Air fl ow noises Valves do not seal against duct. Valves not suffi ciently open The mains power supply has failed. Lower the comfort temperature. Increase the comfort temperature. Replace the fi lters. Clean the valves. Clean the heat exchanger. Thaw the heat exchanger. Clean the fan. Clean the ventilation ducts. the fan bearings. Change the ventilation control settings. Install the siphon again. Seal the air leak. Install the valves again. Set the valves again. Leaking condensation Condensation drain clogged Clean the condensation drain. Condensation from exhaust duct does not Check whether run into drain plate the connections are correct. Wired 3-position Wiring is not OK switch does not function Switch is defective Wireless 3-position switch does not function Battery is discharged Check the circuitry of the 3-position switch using a voltmeter: Voltage only on N & L3: [The fans run at position 1]. Voltage only on N & L3 & L2: [The fans run at position 2]. Voltage only on N & L3 & L1 or N & L3 & L2 & L1: [The fans run at position 3]. Check the battery. Replace the battery, if necessary. Instructions for the Installer 43

68 4 4.8 Spare Parts The following table contains an overview of the spare parts available for the ComfoAir 350. Number Part 1 Fans (left and right) 2 PCB panel in ComfoAir PCB panel in top-mounted casing, Basic or Luxury version. 4 Temperature sensors T1 / T3 (in top of unit, on electronic carriage). 5 Temperature sensors T2 / T4 (in fan casing of both fans). 6 Servo motor & cable (for bypass and preheater) 7 Heat exchanger (or combined heat/enthalpy exchanger) 8 Filter clamp (2x) 9 Filter cloths (2x) 10 Filter set (with fi lter clamps, fi lter cloths and fi lter holders). 11 Preheater (also available as an optional kit for subsequent installation). 12 Mounting frame for installation on the fl oor (option). 13 Remote control transmitter (option) 14 Display (option). 44 Instructions for the Installer